Drones revealed the secret of the city of Alexander: what archaeologists found on the Tigris

Alexandria on the Tigris suddenly ceased to be a “legend of archaeologists”: new filming and geophysics show that the “lost city” in the south of modern Iraq was huge, carefully planned metropolis at the mouth Tiger.

We are talking about one of the many Alexandriumbased Alexander the Great after the eastern campaigns. The location known today as Jebel Khayaberremained in a “complicated zone” near the border for many years, but new mapping reveals streets, temples, industrial zones, channels and residential areas of such a scale that they are considered among the largest known in antiquity.

It is also important that this was not a small outpost. Researchers believe: the city has worked as a critical nodeconnecting river traffic to Mesopotamia with sea routes to Persian Gulf and trading networks reaching out to India and further. In other words, Alexander the Great I guessed right again with the location: the bet was on logistics, water and trade.

The basic hypothesis is that the ruins found correspond to Alexandria on the Tigrisfounded at the end of the 4th century BC. e. After this, the city appears in sources under later names, including Kharaks Spasin (And Kharaks Maysan), and appears in Roman texts and inscriptions, hinting at the long life of the settlement after Alexander’s death.

Geography also works in favor of the version of the “correct Alexandria”. “Ancient authors describe how sedimentation in southern Mesopotamia continually reshaped waterways and shores, creating the need for a new port system located near the confluence of the Tigris and Karun rivers, near what was then the Persian Gulf coastline“, the message explains University of Konstanz.

Mapping a metropolis without excavation

The modern “reality check” began with a mid-20th century observation: a researcher John Hansman noticed on aerial photographs Royal Air Force (1960s) huge outlines of the settlement. But decades of instability made it impossible to properly confirm the findings on the ground. Proximity to the Iranian border and subsequent use of the area during Iran-Iraq war made systematic work almost impossible.

When foreign teams were able to return to southern Iraq in the 2010s, the scale of the fortifications had an effect: the gigantic perimeter is still legible in places and outlines a city “square” noticeably larger than expected.

Then we included “modern magic without shovels”: field surveys (ceramics, brick fragments), photogrammetry from drones and magnetic surveyto restore the layout without direct large-scale excavations.

One of the key tools was magnetometry (magnetic reconnaissance), capable of detecting subtle variations in the Earth’s magnetic field caused by buried walls, ditches, furnaces, industrial facilities and other structures. According to the team, this revealed streets and grid layouts, as well as later changes in orientation, indicating several phases of construction and changing functions of areas throughout the life of the city.

What did the “new” cards show? Descriptions speak of gigantic residential areas, temple enclosures, craft zones with kilns and smelting furnaces, canals and an inland port area. All this points to a dense urban economy designed for redistribution, production and trade.

The function of the city coincides well with the period when exchanges between Mesopotamia And India intensified, and cities on the Tigris, such as Seleucia And Ctesiphonflourished as imperial capitals and markets for consumption. In this context Alexandria/Charax would look like the “southern gate” of the system, feeding the same trading world.

But the same landscape dynamics that allowed the city to emerge probably also helped close it down. Sources describe ongoing sedimentation and channel migration: the coastline moved south and Tiger shifted the current to the west, gradually cutting off the settlement from the water necessary to remain a port and shipping hub.

Without this connection, the city declined and was largely abandoned by the end of Late Antiquity.

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