Capital city of the Mongolian Empire, Karakorum, ‘much larger than previously thought,’ according to archaeologists who have mapped the ancient metropolis for the first time.
Founded by Genghis Khan’s son, Ögödei, in the 13th century CE, the scope of the city has been revealed thanks to experts from the University of Bonn in Germany.
They were able to map the road layouts, neighbourhoods and details of the ancient city without digging up the surrounding landscape thanks to advanced geophysics.
The work has given historians a deeper insight into what happened to the capital city of the largest contiguous empire, which had fallen into ruin by the 15th century CE.
They found the remains of walls and gates mentioned int he historic record, as well as a city beyond the walls extended out as far as 1.8 miles along approaching roads.
Inside the walls the city spanned an area half a square mile, with palaces, regions of the city for industrial and residential purposes, as well as older areas.
However, the team ultimately found the biggest single feature of Karakorum was nothing, with 40 per cent of the area within the walls left empty.
The vehicle-drawn SQUID measurement system at work in front of the Buddhist monastery of Erdene Zuu, founded in 1586 and probably erected on top of the former palace area of Karakorum, according to the researchers
Founded by Genghis Khan’s son, Ögödei, in the 13th century CE, the scope of the city has been revealed thanks to experts from the University of Bonn in Germany
The work has given historians a deeper insight into what happened to the capital city of the largest contiguous empire, which had fallen into ruin by the 15th century CE
Professor Jan Bemmann, study lead, found that the Mongolian city, first rediscovered in 1889 but rarely studied since, stretched far beyond its walls.
‘We arrive at a profound re-evaluation of this important city, which underlines its eminent place in Mongolian and Eurasian history,’ said Professor Bemmann.
It was founded by Ögödei, son and successor of Chinggis, who is more commonly known as Genghis Khan, as a permanent home for the massive empire.
It was built up on the site of one of the hoarding empire’s camps in the 13th century CE, with most of its construction completed under the reign of Möngke Khan.
Franciscan friar William of Rubruck, who was an envoy of King Louis IX of France and visited the city in the 13th century, described it as an ‘enclosed city with four gates’ .
He wrote that it was thriving and home to Chinese artisans, Muslim merchants and captives from all over the empire.
For both Ögödei and Möngke, it was an important place, according to historians.
However, it had fallen into dereliction by the 15th century, just 200 years after it was founded, due to the Mongolian Empire fracturing into separate entities.
While the city was never forgotten, and lived on in the history books, its exact location was unknown until an expedition in 1889 found it again.
‘Limited excavations at prime spots of the city and earlier maps revealed insights into the core of the walled city area, said Prof Bemmann.
He said there is knowledge of the craftsmen quarter in the middle of the city, of a Buddhist temple and of the location of the palace.
‘However, we do only poorly understand the inner layout and the extent of the city beyond the actual walled area as well as the social organisation of the city’s population,’ the researcher explained.
To fill in the gaps they surveyed an 1,149 acre area of land over 52 days using a piece of equipment known as ‘SQUID’ (Superconducting Quantum Interference Device).
They found the remains of walls and gates mentioned int he historic record, as well as a city beyond the walls extended out as far as 1.8 miles along approaching roads
They were able to map the road layouts, neighbourhoods and details of the ancient city without digging up the surrounding landscape thanks to advanced geophysics
However, the team ultimately found the biggest single feature of Karakorum was nothing, with 40 per cent of the area within the walls left empty
This measures the topography of the surface, but also the magnetic field beneath the surface, as different materials have different magnetic properties.
They combined the ‘SQUID’ data with field surveys, aerial photography and an analysis of the historic records to build a map of Karakorum.
‘The most exciting facet of our work for me was to see the progress of data acquisition during the field season,’ said Prof Bemmann.
‘It was astonishing to witness the growing extent of the map day by day and with that the digital reconstruction of Karakorum.
Professor Jan Bemmann, study lead, found that the Mongolian city, first rediscovered in 1889 but rarely studied since, stretched far beyond its walls
Preliminary reconstruction of the road system within and leading to Karakorum, based on the magnetic and topographic mapping (graphic by J. Bemmann and S. Reichert).
With every day, with every new piece of the city added to the map, our understanding of the city grew alongside.’
They mapped city walls, revealing three of the four main gates mentioned by William of Rubruck in his 13th century discourse, but also looked beyond the walls.
‘In the thirteenth century CE, based on his experience of medieval western European cities, Rubruck had no doubt that the ramparts surrounded the entire city of Karakorum,’ the researchers wrote in the paper, published in Antiquity.
This perspective informed later historians and archaeologists alike, painting a picture of a city within its walls that lasted generations.
‘The combination of large-scale and high resolution surveys now undertaken reveals that the city had no clear limits, with built areas becoming less dense with distance from its centre,’ the authors explained.
Inside the walls, the city spanned about half a square mile, with neighbourhoods of different building designs, hinting at distinct functions or inhabitants in various parts of the city, with no overall coherent vision.
In the middle of the city there were denser deposits seen within the record, which suggests some parts were occupied longer, building out from the middle.
Despite all the building, it was a mainly empty city, with about 40 per cent of the area within the walls left empty, reflecting the mainly nomadic origins of its inhabitants, with many remaining nomadic even after the city was built.
As such they would not have needed to visit the city much, if at all, so would not need to build permanent residences, the researchers explained.
Even Ögödei and Möngke, who founded and built the city, would have only spent part of the year there – although they did build palaces, and powerful members of Mongolian society joined them in constructing permanent dwellings in the city.
The labourers and craftspeople, needed to sustain the city, may have been its only permanent residents, and most would have been permanently relocated or taken as prisoners of war – adding to the alien nature of the city, the team explained.
It was founded by Ögödei, son and successor of Chinggis, who is more commonly known as Genghis Khan, as a permanent home for the massive empire
‘The peculiarity of these cities lies in the fact that they were ‘implanted’ by the ruler into a landscape without fixed architecture, and that the permanent inhabitants were brought from abroad,’ they wrote in their paper.
‘Hence, these cities remained foreign entities, the continued existence of which was unimportant for the pastoral nomads, as they were not dependent on them.’
Professor Bemmann says research into Karakorum isn’t just about shedding light on a capital city, but on a different type of city to those found in Europe.
He says it was created by the ruling classes, but detached from them and wider Mongolian society, used for visits, rather than occupation.
The findings have been published in the journal Antiquity.