Petra: The Rose-Red City of the Nabataeans

You are standing at the entrance to one of the most extraordinary archaeological sites on earth. Petra — the rose-red city of the Nabataeans — was lost to the Western world for roughly a thousand years, known only through vague references in ancient texts and the whispered directions of local Bedouin who regarded it as their own, until a young Swiss explorer named Johann Ludwig Burckhardt rediscovered it in eighteen twelve. Burckhardt had been travelling the Middle East in disguise, learning Arabic, posing as a Muslim pilgrim, and when he heard stories of a great ruined city hidden in the mountains of what is now southern Jordan, he convinced a local guide to take him there by claiming he had a vow to sacrifice a goat at the tomb of Aaron, a prophet venerated by both Muslims and Jews near the ancient city. That ruse — a scholar in disguise, slipping past the suspicions of a community that had kept this secret for centuries — gave Europe its first modern account of Petra. The city he found had been built by the Nabataeans, an Arab people whose origins remain somewhat mysterious but who emerge in the historical record around the fourth century BC as semi-nomadic traders in the desert regions south of the Dead Sea. By the first century BC the Nabataeans had built something remarkable: a trading empire that controlled the most lucrative overland routes in the ancient world, the spice and incense roads connecting Arabia to the Mediterranean. Frankincense and myrrh from southern Arabia, silks and spices from India and China, bitumen from the Dead Sea used to waterproof Egyptian mummies — all of it passed through Nabataean hands and through Nabataean territory. Petra was the hub of that network, a city of perhaps twenty thousand people at its height, carved and built from the rose-coloured sandstone of the Jordanian mountains. The Nabataeans were not merely middlemen. They were sophisticated engineers, hydraulic geniuses who built an elaborate system of channels, cisterns, dams, and pipes that captured and stored every drop of rainwater in this desert landscape, allowing a large city to survive in an environment where water seems impossible. They were architects who developed a distinctive style of rock-cut architecture of enormous sophistication. And they were the inventors of the Nabataean script, a writing system from which the modern Arabic alphabet ultimately derives — a contribution to human civilisation that persists in the shape of letters written and read by hundreds of millions of people today. The Nabataean kingdom was eventually absorbed into the Roman Empire in one hundred and six AD, when the emperor Trajan transformed it into the Roman province of Arabia Petraea. Over subsequent centuries the population dwindled, the trade routes shifted, and the great carved city fell into obscurity. It survived intact because its isolation protected it — there was simply no one wealthy enough or powerful enough nearby who wanted to quarry its stone or demolish its facades for building material. The path ahead of you leads into their world. You have roughly eight kilometres of walking today through one of the great human places. Take your time. Drink water. The light in this landscape changes constantly as the sun moves, and the stone takes on different colours at different hours — pale gold in the morning, deep rose at midday, amber and violet toward evening. Whatever time of day you are here, the colours will be extraordinary.

You are standing at the entrance to one of the most extraordinary archaeological sites on earth. Petra — the rose-red city of the Nabataeans — was lost to the Western world for roughly a thousand years, known only through vague references in ancient texts and the whispered directions of local Bedouin who regarded it as their own, until a young Swiss explorer named Johann Ludwig Burckhardt rediscovered it in eighteen twelve. Burckhardt had been travelling the Middle East in disguise, learning Arabic, posing as a Muslim pilgrim, and when he heard stories of a great ruined city hidden in the mountains of what is now southern Jordan, he convinced a local guide to take him there by claiming he had a vow to sacrifice a goat at the tomb of Aaron, a prophet venerated by both Muslims and Jews near the ancient city. That ruse — a scholar in disguise, slipping past the suspicions of a community that had kept this secret for centuries — gave Europe its first modern account of Petra. The city he found had been built by the Nabataeans, an Arab people whose origins remain somewhat mysterious but who emerge in the historical record around the fourth century BC as semi-nomadic traders in the desert regions south of the Dead Sea. By the first century BC the Nabataeans had built something remarkable: a trading empire that controlled the most lucrative overland routes in the ancient world, the spice and incense roads connecting Arabia to the Mediterranean. Frankincense and myrrh from southern Arabia, silks and spices from India and China, bitumen from the Dead Sea used to waterproof Egyptian mummies — all of it passed through Nabataean hands and through Nabataean territory. Petra was the hub of that network, a city of perhaps twenty thousand people at its height, carved and built from the rose-coloured sandstone of the Jordanian mountains. The Nabataeans were not merely middlemen. They were sophisticated engineers, hydraulic geniuses who built an elaborate system of channels, cisterns, dams, and pipes that captured and stored every drop of rainwater in this desert landscape, allowing a large city to survive in an environment where water seems impossible. They were architects who developed a distinctive style of rock-cut architecture of enormous sophistication. And they were the inventors of the script from which the modern Arabic alphabet derives. The path ahead of you leads into their world. You have roughly eight kilometres of walking ahead of you today through one of the great human places. Take your time. Drink water. The light in this landscape changes constantly as the sun moves, and the stone takes on different colours at different hours — pale gold in the morning, deep rose at midday, amber and violet toward evening. Whatever time of day you are here, the colours will be extraordinary.

Before you enter the Siq, take a moment to look at the structures around you here. The three large free-standing rectangular blocks of stone ahead, each one carved from the living rock but left as separate pillars rather than hollowed out, are called the Djinn Blocks — djinn being the Arabic word for spirits or supernatural beings. There are three of these monuments here and they are among the most enigmatic objects in Petra. Their exact function remains a matter of scholarly debate. Some archaeologists believe they were tomb markers, signalling the presence of burials in the rock face nearby. Others have proposed they were religious monuments of some kind, perhaps understood as houses for supernatural presences associated with the dead or with the sacred landscape. Whatever they were, they are impressive: the largest stands roughly seven metres tall, and all three were carved in the Nabataean period, probably in the first century BC or the first century AD. The blankness of them — undecorated, unexplained, just standing — gives them an odd power. Look up now at the rock face above and to your right. The structure carved high into the cliff is the Obelisk Tomb — named for the four obelisk-shaped pillars that crown its upper register, each one representing a person buried here. The obelisk was a form borrowed from Egypt and carried into the Nabataean visual repertoire as a symbol of the dead, pointing skyward. Below the obelisk level, carved into the lower section of the same cliff face, is the Bab Al-Siq Triclinium, a banqueting hall used for the funerary meals that were a central part of Nabataean religious practice. The Nabataeans held regular commemorative feasts at the tombs of their dead, a tradition shared with other cultures of the ancient Mediterranean world, and the triclinium — the word means a room with three dining couches arranged around three walls — was designed for exactly this purpose. The two structures, one stacked above the other on the same cliff face, give you a first sense of how densely the Nabataeans layered the sacred and the social across their landscape. They did not separate the world of the living from the world of the dead. The funerary city and the living city coexisted, and the banquets at the tombs were a regular social event, a way of maintaining connection between the generations. The cliffs on either side of you as you walk toward the Siq are riddled with tomb facades of varying elaboration, and you will pass dozens more before the day is done. One thing to hold in mind as you walk through Petra today: almost everything you see is a tomb. The houses, the market stalls, the temples — most of the built structures of the daily Nabataean city were of mudbrick and timber and have long since dissolved back into the desert floor. What survives is what was carved into stone, and stone was reserved primarily for the dead. The living city that surrounded these tombs was vastly larger and more complex than anything archaeology can show you, but it is almost entirely gone. The landscape you are walking through is the permanent city, the city of the dead that outlasted the city of the living by two thousand years. That is worth keeping in mind as you approach the Siq. The landscape is about to change completely.

Before you enter the Siq, take a moment to look at the structures on either side of you. The three large free-standing rectangular blocks of stone ahead of you, each one carved from the living rock but left as separate pillars rather than hollowed out, are called the Djinn Blocks — djinn being the Arabic word for spirits. There are three of these monuments here and they are among the most enigmatic objects in Petra. Their exact function remains a matter of scholarly debate. Some archaeologists believe they were tomb markers, signalling the presence of burials in the rock face nearby. Others have proposed they were religious monuments of some kind, perhaps housing the spirits of the dead in a more literal sense than we might expect — the Nabataeans, like most ancient peoples, had a complex and not always clearly understood relationship between sacred spaces and the deceased. Whatever they were, they are impressive: the largest stands roughly seven metres tall, and all three were carved in the Nabataean period, probably in the first century BC or the first century AD. Look up now at the rock face above and to your right. The structure carved high into the cliff is the Obelisk Tomb — named for the four obelisk-shaped pillars that crown its upper register, each one representing a person buried here. Below the obelisk level, carved into the lower section of the same cliff face, is the Bab Al-Siq Triclinium, a banqueting hall used for the funerary meals that were a central part of Nabataean religious practice. The Nabataeans held regular commemorative feasts at the tombs of their dead, a tradition shared with other cultures of the ancient Mediterranean world, and the triclinium — the word means a room with three dining couches arranged around three walls — was designed for exactly this purpose. The pairing of the two structures, one above the other, carved from the same face of rock, gives you a first glimpse of the extraordinary ambition of Nabataean rock-cut architecture. But this is only the beginning. The cliffs on either side of you as you walk are riddled with tomb facades in various states of preservation, some simple and unadorned, others elaborately carved, and the density of the funerary landscape around Petra's approaches reflects just how seriously the Nabataeans took the business of honouring their dead. The city of the living and the city of the dead occupied the same landscape here, and you cannot fully understand one without the other. Keep walking south toward the entrance of the Siq. The landscape is about to change completely.

You are about to enter the Siq, and nothing quite prepares you for what this feels like. The word siq means "shaft" in Arabic, and the description is accurate: this is a natural geological fissure, a crack in the sandstone mountains created by tectonic forces over millions of years, through which a river once flowed. It stretches one point two kilometres from this entrance to the emergence point at the Treasury, and in places the walls close to barely two metres apart while rising to a height of eighty metres or more on either side. Standing at the entrance and looking in, you see the walls narrowing into a dark corridor of rock, the light above you reduced to a strip of sky, and the sounds of the world outside — wind, distant traffic, voices — falling away almost immediately as the stone closes around you. The Siq is not a tunnel. It is open to the sky the entire length, but the combination of height, narrowness, and the way the path curves means that within the first hundred metres you feel completely enclosed in another world. The light inside is extraordinary. The sandstone walls are layered in bands of colour — cream, rust, rose, ochre, violet, chocolate brown — and the light that filters in from the strip of sky above bounces and reflects off these surfaces in constantly shifting combinations. In the morning, the light is cool and the colours are pale. By midday, the walls glow with deep orange and pink. In the late afternoon, the shadows deepen the colours into something almost purple. Whatever hour you walk through, you are inside one of the most beautiful natural spaces on earth, and the Nabataeans knew it. Look at the walls carefully as you walk. You will see carved niches at intervals — small recesses housing carved or moulded images of the Nabataean gods, particularly Dushara, the principal male deity often represented as a simple rectangular block of stone, and Al-Uzza, the female deity associated with water. These niches turned the Siq into a sacred processional route, a passage between the ordinary world outside and the sacred city within. Look also at the carved channels running along the base of both walls. These are the Nabataean water conduits — one side carrying water into the city from springs to the north, the other carrying water out. The engineering precision required to maintain a consistent gradient across one point two kilometres of carved rock channel, without pumps or modern surveying equipment, is genuinely remarkable. The Nabataeans were perhaps the greatest water engineers of the ancient world, and the Siq's channels are only the most visible element of a hydraulic system that supplied an entire city in the middle of a desert.

You are about to enter the Siq, and nothing quite prepares you for what this feels like. The word siq means "shaft" in Arabic, and the description is accurate: this is a natural geological fissure, a crack in the sandstone mountains created by tectonic forces over millions of years, through which a seasonal river once flowed. It stretches one point two kilometres from this entrance to the emergence point at the Treasury, and in places the walls close to barely two metres apart while rising to a height of eighty metres or more on either side. Standing at the entrance and looking in, you see the walls narrowing into a dim corridor of rose-coloured rock, the light above reduced to a strip of sky, and the sounds of the world outside — wind, distant voices, the occasional bell of a working camel — falling away almost immediately as the stone closes around you. The Siq is not a tunnel. It is open to the sky its entire length, but the combination of height, narrowness, and the way the path curves means that within the first hundred metres you feel completely enclosed in another world. The light inside is the first extraordinary thing. The sandstone walls are layered in bands of colour — cream, rust, rose, ochre, violet, chocolate brown — and the light that filters down from the strip of sky above bounces and reflects off these surfaces in constantly shifting combinations. In the morning, the light is cool and the colours are pale. By midday, the walls glow with deep orange and pink. In the late afternoon, the shadows deepen the colours into something almost purple. Whatever hour you walk through, you are inside one of the most beautiful natural spaces on earth, and the Nabataeans recognised it as sacred from the beginning. Look at the walls carefully as you walk. You will see carved niches at intervals — small recesses housing carved or moulded images of the Nabataean gods, particularly Dushara, the principal male deity often represented as a simple rectangular block of stone, and Al-Uzza, the female deity associated with water and fertility. These niches turned the Siq into a sacred processional route, a passage between the ordinary world outside and the divine city within. Thousands of people walked this passage every year — pilgrims, traders, officials, the funeral processions of the Nabataean elite — and the gods watched from the walls. Look also at the carved channels running along the base of both walls. These are the Nabataean water conduits — one channel bringing water into the city from springs to the north, the other draining water out. The engineering precision required to maintain a consistent gradient across one point two kilometres of carved rock channel, cut by hand without modern surveying tools, is genuinely remarkable. There was also a ceramic pipe system running within one channel wall to bring additional water under pressure. The Nabataeans were perhaps the most sophisticated water engineers of the ancient world, and the Siq's channels are only the most visible element of a system that supplied an entire desert city.

You round the final curve of the Siq, the walls narrow to their closest point, and then — suddenly, without warning — you see it. The Treasury. Al-Khazneh. A rose-red facade thirty metres wide and forty metres tall, carved directly into the sandstone cliff face with extraordinary precision, lit with a warm golden light that seems to emanate from the stone itself. After one point two kilometres of narrow canyon, the visual impact is almost physical. Your first instinct will be to stop walking entirely, which is the correct instinct. Stand here for a moment and take it in. The Treasury is the most famous image of Petra, reproduced on a thousand magazine covers and travel posters, used as the location for the climax of the nineteen eighty-nine film Indiana Jones and the Last Crusade — the movie in which it appears to be the resting place of the Holy Grail, an association that has no historical basis whatsoever but has lodged the Treasury in popular imagination as a place of hidden treasure. The name Al-Khazneh — the Treasury — comes from a Bedouin legend that the large stone urn perched at the top of the central element of the facade contained treasure hidden by an ancient pharaoh. Bedouin tribesmen reportedly fired bullets at the urn for generations hoping to shatter it and release the gold. The bullet marks are still visible in the pockmarked surface. There is, of course, no treasure in the urn. The urn is solid stone. But the name stuck. The Treasury is not a treasury at all. It is a royal tomb. Archaeological excavations have found human remains and funerary objects inside, and the most widely accepted theory is that it was built as the mausoleum of the Nabataean king Aretas IV, who ruled from nine BC to forty AD and presided over the height of Nabataean power and prosperity. The facade you are looking at is a masterwork of Hellenistic architectural sculpture. The lower level features six columns with Corinthian capitals. Between and above them are carved figures: the Dioscuri — Castor and Pollux, the divine twins of Greek mythology — guard the sides. Eagles and other symbols of divinity appear at the corners. The central upper tholos, a circular structure framed by a broken pediment, is topped by the famous urn. The style is Greek in vocabulary but the execution is distinctly Nabataean, and the combination reflects the sophisticated cultural synthesis of a trading people who absorbed influences from every direction — Greek, Egyptian, Roman, Arabian — and made something entirely their own. The interior, carved into the rock behind this spectacular facade, is surprisingly plain: three chambers, their walls left in unfinished stone, with niches that held the bodies of the dead. The contrast between the elaborately decorated exterior and the austere interior is typical of Nabataean funerary architecture and tells you something about their priorities: the facade was a statement for the living, the chamber was a space for the dead. The facade was designed to be seen, to communicate wealth and sophistication and spiritual power to everyone who emerged from the Siq. It was the final destination of the processional route that began at the entrance of the canyon, and its impact on a first-century visitor arriving by camel caravan after weeks crossing the desert would have been as overwhelming as it is for you now, after one point two kilometres on foot. The canyon, the colours, the narrowing, the sudden reveal — the Nabataeans understood theatre. They designed this approach deliberately, and the effect has not diminished in two thousand years.

You round the final curve of the Siq, the walls narrow to their closest point, and then — suddenly, without warning — you see it. The Treasury. Al-Khazneh. A rose-red facade thirty metres wide and forty metres tall, carved directly into the sandstone cliff face with extraordinary precision, lit with a warm golden light that seems to emanate from the stone itself. After one point two kilometres of narrow canyon, the visual impact is almost physical. Your first instinct will be to stop walking entirely, which is the correct instinct. Stand here for a moment and take it in. The Treasury is the most famous image of Petra, reproduced on a thousand magazine covers and travel posters, used as the location for the climax of the nineteen eighty-nine film Indiana Jones and the Last Crusade — the movie in which it appears to be the resting place of the Holy Grail, an association that has no historical basis whatsoever but has lodged the Treasury in popular imagination as a place of hidden treasure. The name Al-Khazneh — the Treasury — comes from a Bedouin legend that the large stone urn perched at the top of the central element of the facade contained treasure hidden by an ancient pharaoh. Bedouin tribesmen reportedly fired bullets at the urn for generations hoping to shatter it and release the gold. The bullet marks are still visible in the pockmarked surface. There is, of course, no treasure in the urn. The urn is solid stone. But the name stuck. The Treasury is not a treasury at all. It is a royal tomb. Archaeological excavations have found human remains and funerary objects inside, and the most widely accepted theory is that it was built as the mausoleum of the Nabataean king Aretas IV, who ruled from nine BC to forty AD and presided over the height of Nabataean power and prosperity. The facade you are looking at is a masterwork of Hellenistic architectural sculpture. The lower level features six columns with Corinthian capitals. Between and above them are carved figures: the Dioscuri — Castor and Pollux, the divine twins of Greek mythology — guard the sides. Eagles and other symbols of divinity appear at the corners. The central upper tholos, a circular structure framed by a broken pediment, is topped by the famous urn. The style is Greek in vocabulary but the execution is distinctly Nabataean, and the combination reflects the sophisticated cultural synthesis of a trading people who absorbed influences from every direction — Greek, Egyptian, Roman, Arabian — and made something entirely their own. The interior, carved into the rock behind this spectacular facade, is surprisingly plain: three chambers, their walls left in unfinished stone, with niches that held the bodies of the dead. The contrast between the elaborately decorated exterior and the austere interior is typical of Nabataean funerary architecture and tells you something about their priorities: the facade was a statement for the living, the chamber a space for the dead.

Move past the Treasury and continue into the main canyon, and now the full scale of Petra's funerary architecture begins to reveal itself. The cliff face to your left opens up into a long sequence of tomb facades carved side by side and one above the other in a dense, almost urban arrangement — this is what archaeologists call the Street of Facades, and it represents the most concentrated display of Nabataean rock-cut architecture in the entire city. Count the facades as you walk. There are dozens of them here, ranging from simple openings with minimal decoration to more elaborate carved doorways with cornices, pilasters, and stepped crenellations at the top — a distinctive Nabataean decorative element that appears again and again throughout Petra. The stepped crenellations at the top of many of these facades are sometimes called crow-step or staircase designs, and they appear in funerary architecture across the ancient Near East, from Egypt to Mesopotamia, suggesting that Petra was not building in isolation but drawing on a shared visual vocabulary that stretched across the entire region. The tombs here range in date from roughly the first century BC to the second century AD, and the variation in size and elaboration reflects the social hierarchy of Nabataean society. The grandest tombs — the Treasury, the Royal Tombs you will see later — were for royalty and the highest elite. The tombs on the Street of Facades served the middle ranks of Nabataean society: prosperous merchants, successful traders, people of means but not of the highest rank. The simplest tomb openings, cut into the cliff with minimal decoration, served people of more modest status. The funerary landscape of Petra is in this way a kind of social X-ray of Nabataean civilization, the hierarchy of the living translated directly into stone. As you walk this section, notice the quality of light inside the canyon. The walls here are lower and further apart than in the Siq, and the light falls differently — warmer, more direct, the colours of the stone shifting from the pinker tones at the Treasury toward deeper reddish-orange as the iron content of the sandstone varies. The stone is not one colour but dozens, and the natural streaking and layering of the rock has been incorporated by the tomb carvers rather than concealed. Many facades are cut to reveal the natural banding of the sandstone, so the carved columns and cornices are themselves striped with colour. Stand still for a moment and listen. The sounds of the canyon — footsteps on sand, distant bells from working camels, the wind moving through the rock passages — are the same sounds that would have filled this space two thousand years ago.

Move past the Treasury and continue into the main canyon, and now the full scale of Petra's funerary architecture begins to reveal itself. The cliff face to your left opens up into a long sequence of tomb facades carved side by side and one above the other in a dense, almost urban arrangement — this is what archaeologists call the Street of Facades, and it represents the most concentrated display of Nabataean rock-cut architecture in the entire city. Count the facades as you walk. There are dozens of them here, ranging from simple openings with minimal decoration to more elaborate carved doorways with cornices, pilasters, and stepped crenellations at the top — a distinctive Nabataean decorative element that appears again and again throughout Petra. The stepped crenellations at the top of many of these facades are sometimes called crow-step or staircase designs, and they appear in funerary architecture across the ancient Near East, from Egypt to Mesopotamia, suggesting that Petra's builders were fluent in a shared visual language that connected the desert city to the wider world of ancient commerce and culture. The tombs here range in date from roughly the first century BC to the second century AD, and the variation in size and elaboration reflects the social hierarchy of Nabataean society with unusual directness. The grandest tombs — the Treasury you have just passed, the Royal Tombs ahead — were for royalty and the highest elite. The tombs on the Street of Facades served the middle ranks: prosperous merchants, successful traders, people of means but not of the highest rank. The simplest tomb openings, cut into the cliff with minimal decoration, served people of more modest status. Death in Petra was as hierarchical as life, and the cliff face is an unambiguous record of that hierarchy. As you walk this section, notice how the light has changed from the Siq. The walls here are lower and the valley wider, and the sun falls directly onto the stone rather than filtering down from a crack above. The colours shift too — the pinker, more rose tones of the Treasury give way to deeper reddish-orange and rust as the iron content of the sandstone varies. The stone is not one colour but dozens, and the natural streaking and layering of the rock has been incorporated by the tomb carvers rather than concealed. Many facades are cut to reveal the natural banding of the sandstone, so the carved columns and cornices are themselves striped in colour — the architecture working with geology rather than against it. Stand still for a moment and listen. The sounds of the canyon — footsteps on sand, the distant bells of working camels, the wind moving through the rock passages, the occasional laugh of a child near the souvenir stalls — are broadly the same sounds that would have filled this space two thousand years ago. The camels especially would have been here in enormous numbers, unloading incense caravans from Arabia. The smell of frankincense and myrrh would have been pervasive — these were not luxury imports but the essential materials of religious practice across the entire ancient Mediterranean world, burned in temples from Rome to Alexandria to Jerusalem. The Nabataeans controlled that supply and grew extraordinarily wealthy from it. The carved facades you are walking past were paid for with incense money, and the city behind them was the hub of a network that connected Arabia to Rome to India in one continuous chain of commerce. The Street of Facades is where that wealth was permanently inscribed in stone.

The rock-cut theatre ahead of you is one of the most unexpected structures in Petra, and it serves as a reminder that this was not simply a city of tombs but a fully functioning ancient metropolis with all the cultural and civic infrastructure of any major city in the Graeco-Roman world. The theatre was carved directly into the hillside from the living rock, seating estimates range from three thousand to around eight thousand five hundred spectators in different phases, and it was built or substantially enlarged in the first century AD, probably during the reign of Aretas IV or shortly after. It is a telling detail that to construct the theatre's cavea — the seating area — the builders carved directly through an existing layer of tomb facades, demolishing some of them to create space for the seats. This tells you that by the first century AD, Petra had grown so large and its civic aspirations so ambitious that even the funerary landscape was being reorganised to accommodate urban expansion. The dead could be moved; the theatre could not wait. The theatre follows the standard Graeco-Roman design: semicircular seating faces a stage building across an orchestra area, with a scaenae frons — a decorated stage backdrop — that in Petra's case was partly carved from the natural rock face. The acoustics, as with most ancient theatres sited in natural rock hollows, would have been very good — the curved stone walls focusing sound onto the stage with natural efficiency. What was performed here? Almost certainly everything that a sophisticated first-century city performed in its theatre: Greek and Roman drama, musical performances, civic ceremonies, and after the Roman annexation in one hundred and six AD probably the full range of Roman entertainment. That annexation — when the emperor Trajan absorbed the Nabataean kingdom into the empire without apparent military resistance, making Petra the capital of the new province of Arabia Petraea — was the beginning of a long, slow decline for Petra as a major trading power. The Romans rerouted the northern trade routes through Palmyra in Syria, bypassing Petra's controlling position on the southern spice roads. Revenue declined. The extraordinary building programme that had produced the Treasury and the Royal Tombs wound down. The city continued to function and to be inhabited for centuries — it became an important Christian centre and bishop's seat by the fourth century, and a Byzantine community lived here into the seventh century — but the civic swagger that built this theatre, the confidence of a trading empire at its height, was already beginning to fade. The theatre is a monument to that peak moment, to the brief extraordinary period when a city founded in desert rock by Arab merchants became one of the great cosmopolitan capitals of the ancient world. That moment was perhaps two hundred years long. It produced this. Before you leave the theatre area, look up at the cliff face behind and above the stage area. You can still see the tomb facades that were only partially removed when the theatre was carved — the outlines of niches and doorways cut into the rock that were then sliced through by the construction of the seating tiers. It is one of the few places in Petra where you can read two layers of the city simultaneously, the funerary and the civic, one literally carved over the other. The Nabataeans did not sentimentalise the tombs of their predecessors when they needed the space. They carved through them and kept building.

The rock-cut theatre ahead of you is one of the most unexpected structures in Petra, and it serves as a reminder that this was not simply a city of tombs but a fully functioning ancient metropolis with the cultural and civic infrastructure of any major city in the Graeco-Roman world. The theatre was carved directly into the hillside from the living rock, seating between three thousand and eight thousand five hundred spectators — estimates vary — and it was built or substantially enlarged in the first century AD, probably during the reign of Aretas IV or shortly after. It is a telling detail that to construct the theatre's cavea — the seating area — the Nabataeans carved directly through an existing layer of tomb facades, demolishing some of them to make space for the seats. This tells you that by the first century AD, Petra had grown so large and its civic aspirations so ambitious that even the funerary landscape was being reorganised to accommodate urban expansion. The theatre follows the standard Graeco-Roman design: the semicircular seating faces a stage building across an orchestra area, with a scaenae frons — a decorated stage backdrop — that in Petra's case was also partly carved from the rock. The acoustics, as with most ancient theatres sited in rock hollows, would have been very good. What was performed here? Probably everything that a sophisticated first-century city performed in its theatre: Greek and Roman drama, musical performances, civic ceremonies, perhaps gladiatorial entertainment after the Roman annexation of the Nabataean kingdom in one hundred and six AD, when Petra became the capital of the Roman province of Arabia Petraea. That annexation — when the Roman emperor Trajan absorbed the Nabataean kingdom into the empire — was the beginning of the end for Petra as a major trading power. The Romans rerouted the northern trade routes through Palmyra in Syria, bypassing Petra's controlling position on the southern routes. The city continued to function and even prosper for some time — it became an important Christian centre by the fourth century — but the extraordinary wealth that had funded the Treasury and the Royal Tombs was already fading. The theatre is a monument to Petra's civic peak, to the moment when a city founded on desert trade had become cosmopolitan enough to sit in the dark and watch Sophocles. That moment was brief but it was real.

The great rock face that rises above you now on the eastern side of the valley is the most imposing architectural statement in Petra. These are the Royal Tombs — a group of four monumental facades carved high in the cliff face, each one representing the very peak of Nabataean architectural ambition, and together forming a visual ensemble that has no equal in the ancient world. The first and most elaborate is the Urn Tomb, named for the urn that crowns its pediment, built in the first century AD and remarkable for the open terrace supported by a double row of vaulted chambers that extends in front of the facade at a considerable height above the valley floor. This terrace — which you can climb to — was built to level a sloping hillside and create a processional platform before the tomb entrance. The engineering effort involved is enormous. The vaulted rooms beneath the terrace were later used as cisterns by the Byzantine inhabitants of Petra, a practical repurposing of Nabataean funerary architecture. To the right of the Urn Tomb is the Silk Tomb, named not for any historical reason but for the extraordinary natural colour patterns in its stone — the swirling bands of pink, cream, violet, and russet that streak across the facade in flowing curves are the result of natural mineral deposition in the sandstone, and the carving of the facade has revealed rather than concealed them. The colours here shift as you watch them, changing with the angle of the light, and in the afternoon sun the effect is genuinely extraordinary. The Corinthian Tomb further along takes its name from the Corinthian capitals of its columns, though the overall design is somewhat unusual and may reflect unfinished work or later modification. The largest of the four is the Palace Tomb at the far right, with five stories and a wide facade that appears to imitate the multi-storey architecture of a Roman palace — hence its modern name. The upper two stories were partially constructed rather than entirely rock-cut, using freestanding masonry to extend the facade above the point where the rock face naturally ends. Some of those upper sections have since collapsed, giving the facade its slightly asymmetrical appearance today. These four tombs were built for Petra's kings and highest elite during the first century AD, and to stand before them is to stand before the full expression of what the Nabataean civilisation achieved. They controlled the world's most profitable trade routes, built a desert city of extraordinary sophistication, and left these monuments cut into the living rock of their mountains. Even in ruin, they are overwhelming.

The great rock face that rises above you on the eastern side of the valley is the most imposing architectural statement in Petra. These are the Royal Tombs — a group of four monumental facades carved high in the cliff face, each one representing the very peak of Nabataean architectural ambition, and together forming a visual ensemble unlike anything else in the ancient world. They are best seen in the mid-to-late afternoon, when the low sun strikes the eastern cliff directly and the stone burns from rose to deep amber to almost blood red as the light shifts. If you have timed your visit for this hour, you are in luck. The first and most elaborate is the Urn Tomb, named for the urn that crowns its pediment, built in the first century AD and remarkable for the open terrace supported by a double row of vaulted chambers that extends in front of the facade at a considerable height above the valley floor. This terrace — which you can climb to — was constructed by levelling a sloping hillside and building a platform supported by those long arched galleries below it. The engineering effort involved is enormous. In the Byzantine period the great interior chamber of the Urn Tomb was converted into a church, and a Greek inscription records its dedication in four hundred and forty-six AD — a date that tells you the city was still functioning as a Christian community five centuries after the Treasury was built. The vaulted rooms beneath the terrace were repurposed as cisterns by Byzantine inhabitants. People were endlessly practical about what the Nabataeans had left them. To the right of the Urn Tomb is the Silk Tomb, named not for any historical association but for the extraordinary natural colour patterns in its stone — swirling bands of pink, cream, violet, and russet that streak across the facade in flowing curves, the result of natural mineral deposition in the sandstone revealed by the cutting of the rock. The colours shift as you watch them, changing with the angle of the light. In the afternoon sun the effect is genuinely breath-catching. The Corinthian Tomb further along takes its name from the Corinthian capitals of its columns, though its overall design is somewhat unusual and may reflect unfinished work or later modification. The largest of the four is the Palace Tomb at the far right, with five stories and a wide facade imitating the multi-storey architecture of a Roman palace. The upper stories were partially constructed using freestanding masonry to extend the facade above the point where the cliff face ends, and some of those sections have since partially collapsed. These four tombs were built for Petra's kings and highest elite during the first century AD. They controlled the most profitable trade routes in the ancient world, built a desert city of extraordinary sophistication, and left these monuments cut into the living rock of their mountains as a permanent statement. Even partially collapsed and weathered, they are overwhelming.

You are now entering the heart of ancient Petra — the lower city, the commercial and civic centre where the Nabataeans and later the Romans and Byzantines conducted the daily life of a functioning metropolis. The Colonnaded Street ahead of you runs roughly east-west through the lowest part of the valley, following the course of the ancient Wadi Musa — the Valley of Moses — and it was the main street of Petra during the Roman period, lined on both sides with columns and the shops and public buildings that faced them. The street was constructed in the early second century AD, after the Roman annexation of the Nabataean kingdom in one hundred and six AD, and its layout follows the standard Roman urban form: a wide processional way flanked by covered colonnades providing shade for pedestrians and covered space for commercial activity. You can see the column stumps at regular intervals on both sides — most of the columns themselves have fallen, victims of the earthquakes that have regularly struck this region, particularly the devastating earthquake of three hundred and sixty-three AD that destroyed much of Petra's standing architecture and marked a turning point after which the city never fully recovered. The earthquake is visible in the archaeological record as a sharp horizon layer — a line of destruction beneath which the Roman city lies more or less intact, and above which comes a much simpler Byzantine settlement making do with the ruins. At the western end of the Colonnaded Street stands the Temenos Gate — a monumental triple gateway marking the entrance to the sacred precinct of the temple area. The gate dates from around the first or second century AD and its carved pilasters and decorative elements show the characteristic mixture of Nabataean and Roman architectural traditions of Petra in its Roman period. Beyond the gate, the precinct contained the Temple of the Winged Lions — a Nabataean sanctuary dedicated to the goddess Al-Uzza, whose carved lion-head capitals gave it its modern name — and the Qasr al-Bint, meaning the Palace of the Pharaoh's Daughter in local tradition, though the name is purely folkloric. The Qasr al-Bint is the largest free-standing building in Petra and one of the very few Nabataean structures built above ground rather than carved from the cliff. It was probably the main temple of the god Dushara, built in the first century BC, and its massive mudbrick and stone walls still stand to a considerable height — a striking contrast with the rock-cut landscape around it. In the Nabataean period this street would have been intensely alive: camel caravans unloading goods from Arabia, India, and China; the smell of frankincense and myrrh, of spice and leather and dung; merchants bargaining in Aramaic and Greek and Arabic; the sound of hammers from the metalworkers and stonecutters who supplied a city at the height of its wealth. All of it is gone. But the bones of that world — column stumps, gate piers, temple walls — are visible in the stone beneath your feet.

You are now entering the heart of ancient Petra — the lower city, the commercial and civic centre where the Nabataeans and later the Romans and Byzantines conducted the daily life of a functioning metropolis. The Colonnaded Street ahead of you runs roughly east-west through the lowest part of the valley, following the course of the ancient Wadi Musa — the Valley of Moses — and it was the main street of Petra during the Roman period, lined on both sides with columns and the shops and public buildings that faced them. The street was constructed in the early second century AD, after the Roman annexation of the Nabataean kingdom in one hundred and six AD, and its layout follows the standard Roman urban form: a wide processional way flanked by covered colonnades providing shade for pedestrians and covered space for commercial activity. You can see the column stumps at regular intervals on both sides — most of the columns themselves have fallen, victims of the earthquakes that have regularly struck this region, particularly the devastating earthquake of three hundred and sixty-three AD that destroyed much of Petra's standing architecture. At the western end of the Colonnaded Street stands the Temenos Gate — a monumental triple gateway that marked the entrance to the sacred precinct of the temple area. The gate dates from around the first or second century AD and was later modified. Its carved pilasters and decorative elements show the mixture of Nabataean and Roman architectural traditions that characterise Petra in its Roman period. Beyond the gate, the precinct contained the Temple of the Winged Lions and the Qasr al-Bint — the Palace of the Pharaoh's Daughter — the latter being the largest free-standing building in Petra and one of the very few Nabataean buildings that was constructed above ground rather than carved from the rock. The Qasr al-Bint was probably the main temple of the Nabataean god Dushara, built in the first century BC, and its massive walls still stand to a considerable height — a striking contrast with the rock-cut architecture that surrounds it everywhere else. In the Nabataean period this street would have been noisy and fragrant: camel caravans unloading goods from Arabia, India, and China; the smell of frankincense and myrrh, of spice and leather and dung; merchants negotiating in a dozen languages; the sound of hammers from workshops. All of it is gone now, replaced by the particular silence of desert archaeology, but the bones of that world are visible in the stone beneath your feet.

Turn south from the Colonnaded Street and you will see the monumental staircase that leads up to one of the most fascinating archaeological sites in Petra — the Great Temple, a Nabataean religious complex of considerable scale excavated by a team from Brown University in a long-running project that began in nineteen ninety-three. That excavation has significantly expanded our understanding of Nabataean civic and religious life, recovering thousands of objects — coins, ceramics, architectural fragments, elephant-head capitals — from a site that had been buried and assumed to be unimportant for most of the archaeological history of Petra. The Great Temple is not the largest structure here but it is one of the most architecturally complex, covering roughly seven thousand square metres of terraced construction that climbs the hillside south of the main street. The lower temenos — the sacred enclosure — is entered through a propylaea gateway at the top of the grand staircase you are ascending now. The columns of the lower precinct were topped by capitals decorated with carved elephant heads, a motif that appears nowhere else in the Graeco-Roman architectural tradition and is understood as a specifically Nabataean decorative vocabulary, likely reflecting the commercial connections between Petra and India, where the elephant carried deep associations with power and divinity. Petra was not merely in contact with India through the goods that passed through its hands. Its art absorbed the symbolism of the cultures it traded with, transforming them into something new. The upper precinct contains the main temple podium and, most intriguingly, what appears to be a small theatral structure built within the temple complex — rows of seats arranged looking down toward a central space. Some scholars have proposed that this functioned as a civic assembly area as well as a religious one, a space where the Nabataean council could gather within a sacred setting. Nabataean governance appears to have had a consultative character, less autocratic than the neighbouring empires, and a council chamber within a temple would be consistent with that. From the upper level of the Great Temple, looking north across the full width of the valley, you have one of the great views in Petra: the Colonnaded Street below you, the Royal Tombs blazing on the eastern cliff, the Siq's entrance canyon threading away to the northeast, and somewhere in that direction, hidden in its cleft, the Treasury in its perpetual rose light. This is an entire ancient world laid below you. Think about what it would have looked like at full function — the Colonnaded Street busy with traders, the temples smoking with incense, the great cliff tombs still gleaming with their freshly cut facades, not weathered but sharp and pale against the red rock. That city existed for perhaps two centuries before the slow decline began. What you are looking at now is the skeleton of that city, beautiful in ruin, arguably more beautiful than it was when it was fully inhabited. Take a moment with it before the final climb of the day.

Turn south from the Colonnaded Street and you will see the monumental staircase that leads up to one of the most fascinating archaeological sites in Petra — the Great Temple, a Nabataean temple complex of remarkable scale that was excavated by a team from Brown University in a long-running project that began in nineteen ninety-three and has transformed our understanding of Nabataean civic and religious life. The Great Temple is not the largest structure in Petra but it is one of the most complex, covering roughly seven thousand square metres of terraced architecture that climbs the hillside south of the main street. The lower temenos — the sacred enclosure — is approached by the grand staircase and propylaea gateway you are ascending now. The columns of the lower precinct were topped by capitals decorated with carved elephant heads, a distinctive Nabataean decorative motif that appears nowhere else in the Graeco-Roman architectural tradition and reflects the position of Petra at the intersection of trade routes that connected Arabia to India, where elephants were a symbol of power and divine presence. The upper precinct contains the main temple podium and, most unexpectedly, what appears to be a small theatre-like structure built within the temple complex itself — rows of seats carved into the hillside looking down toward a performance or assembly space. This has led some archaeologists to propose that the Great Temple served not only religious functions but also civic ones, functioning as an assembly space for the Nabataean council or other civic bodies. The combination of religious and civic functions in a single monumental complex would be consistent with what we know of Nabataean governance, which appears to have been more consultative and commercial in character than the autocracies of neighbouring empires. From the upper level of the Great Temple, looking north across the valley, you have one of the best views in Petra: the Colonnaded Street below you, the Royal Tombs on the cliff face to the east, the canyon of the Siq leading away to the northeast, and in the middle distance the cliff face where the Treasury waits in its perpetual rose light. This is a view of an entire ancient world laid out below you, and it is worth stopping here for as long as you can.

The climb to the Monastery is the hardest part of this walk — roughly eight hundred rock-cut steps ascending the mountain northwest of the city centre, a climb that takes thirty to forty minutes at a steady pace and gains several hundred metres of elevation. Every step is worth it. The Monastery — Ad Deir in Arabic — is the largest rock-cut monument in Petra, with a facade approximately fifty metres wide and forty-five metres high. It dwarfs the Treasury. It dwarfs everything. And unlike the Treasury, which sits at the end of a narrow canyon and can only be seen from directly in front, the Monastery is set in an open mountain hollow that allows you to stand far enough back to take in its full scale. The facade follows a similar general design to the Treasury — two levels, columns, a central tholos element — but stripped of much of the Treasury's elaborate figural sculpture, giving it a more austere and monumental character. The great central urn at the top is larger than the Treasury's and stands against an open sky rather than canyon walls. The effect is of something cosmic rather than theatrical. The name Monastery has nothing to do with the building's original function, which was almost certainly a royal tomb or mausoleum dating to the first century BC or first century AD. The name comes from the crosses carved on the interior walls, which indicate that the building was used as a Christian church or chapel at some point during the Byzantine period, probably in the fourth to seventh centuries AD, when Petra was a Christian city and bishop's seat. The Nabataean kingdom had ended, the trade routes had shifted, but people were still living and worshipping in these carved spaces. The cross marks are the final layer in Petra's long story of habitation — Nabataean trading empire, Roman province, Christian community, Byzantine ecclesiastical centre, and then the medieval period during which Petra was a Crusader outpost, and finally the centuries during which the Bedouin of the Bdul tribe made the carved chambers their homes, living in the tombs and cave spaces of the ancient city until the Jordanian government relocated them to a nearby town in the nineteen eighties to allow the archaeological work to proceed. UNESCO designated Petra a World Heritage Site in nineteen eighty-five. In two thousand and seven it was voted one of the New Seven Wonders of the World, in a global poll that confirmed what every traveller who has walked through the Siq already knows: that this place is unlike anywhere else on earth. Sit here for a moment before you descend. Look out across the mountains of Jordan from the height of the Monastery's terrace. The view extends for many kilometres in every direction — bare rock mountains in shades of ochre and rose, the occasional distant shimmer that might be the desert floor, and below you the entire hidden valley of Petra, its canyon mouths and cliff faces and scattered ruins reduced by distance to something quiet and still. This is the rose-red city of the Nabataeans. They built it, and then they vanished from history, absorbed into the Roman Empire, their language slowly displaced, their trade routes rerouted, their name forgotten except in the archaeology. But the city remains, cut into stone, lasting.

The climb to the Monastery is the hardest part of this walk — roughly eight hundred rock-cut steps ascending the mountain northwest of the city centre, a climb that takes thirty to forty minutes at a steady pace and gains several hundred metres of elevation. Every step is worth it. The Monastery — Ad Deir in Arabic — is the largest rock-cut monument in Petra, with a facade approximately fifty metres wide and forty-five metres high. It dwarfs the Treasury. It dwarfs everything. And unlike the Treasury, which sits at the end of a narrow canyon and can only be seen from directly in front, the Monastery is set in an open mountain hollow that allows you to stand far enough back to take in its full scale. The facade follows a similar general design to the Treasury — two levels, columns, a central tholos element — but stripped of much of the Treasury's elaborate figural sculpture, giving it a more austere and monumental character. The great central urn at the top is larger than the Treasury's and stands against an open sky rather than canyon walls. The effect is of something cosmic rather than theatrical. The name Monastery has nothing to do with the building's original function, which was almost certainly a royal tomb or mausoleum dating to the first century BC or first century AD. The name comes from the crosses carved on the interior walls, which indicate that the building was used as a Christian church or chapel at some point during the Byzantine period, probably in the fourth to seventh centuries AD, when Petra was a Christian city and bishop's seat. The Nabataean kingdom had ended, the trade routes had shifted, but people were still living and worshipping in these carved spaces. The cross marks are the final layer in Petra's long story of habitation — Nabataean trading empire, Roman province, Christian community, Byzantine ecclesiastical centre, and then the medieval period during which Petra was a Crusader outpost, and finally the centuries during which the Bedouin of the Bdul tribe made the carved chambers their homes, living in the tombs and cave spaces of the ancient city until the Jordanian government relocated them to a nearby town in the nineteen eighties to allow the archaeological work to proceed. UNESCO designated Petra a World Heritage Site in nineteen eighty-five. In two thousand and seven it was voted one of the New Seven Wonders of the World, in a global poll that confirmed what every traveller who has walked through the Siq already knows: that this place is unlike anywhere else on earth. Sit here for a moment before you descend. Look out across the mountains of Jordan from the height of the Monastery's terrace. The view extends for many kilometres in every direction — bare rock mountains in shades of ochre and rose, the occasional distant shimmer that might be the desert floor, and below you the entire hidden valley of Petra, its canyon mouths and cliff faces and scattered ruins reduced by distance to something quiet and still. This is the rose-red city of the Nabataeans. They built it, and then they vanished from history, absorbed into the Roman Empire, their language slowly displaced, their trade routes rerouted, their name forgotten except in the archaeology. But the city remains, cut into stone, lasting.