Alexander the Great personally chose this spot 2,300 years ago – and then the world forgot it existed.
Now a team of researchers has pinpointed the exact location of Alexandria on the Tigris, a lost city the Macedonian conqueror built in 324 B.C. to anchor trade between India and the Mediterranean.
What they found wasn't a ruin. It was a metropolis – and nobody knew how big it was until now.
How Alexandria on the Tigris Controlled Ancient Trade Between India and Rome
Alexander built this city to solve a problem.
Sedimentation was choking the old harbor system in southern Mesopotamia. The existing ports couldn't handle the trade volume he needed. So he commissioned an entirely new city from scratch in 324 B.C. – one year before his death at age 32 – at the confluence of the Tigris and Karun rivers, near what was then the Persian Gulf shoreline.
The ancient writer Pliny the Elder recorded that Alexander chose the site himself.
For roughly 600 years, Alexandria on the Tigris served as the gateway for virtually all maritime trade entering Mesopotamia from the east. Spices, textiles, metals, and stones from India and Central Asia passed through it before traveling north along the Tigris to imperial capitals like Seleucia and Ctesiphon – cities whose populations reached 400,000 to 600,000 people. Roman writers were still referencing it centuries later under its later name, Charax Spasinou.
Then the Tigris moved.
Sedimentation gradually shifted the river westward, severing the city from its harbor. By the third century A.D., the port had no river. The city had no purpose. The people left, and the desert swallowed it whole.
How Drone and LiDAR Technology Finally Found Alexander the Great's Lost Port City
Researchers first suspected the site at Jebel Khayyaber in southern Iraq in the 1960s, when British researcher John Hansman spotted a massive walled enclosure in old Royal Air Force aerial photographs. Then the Iran-Iraq War turned the site into a military position. Then ISIS controlled large sections of northern Iraq. Foreign archaeologists couldn't get back in until 2014 – and even then, every researcher had to be accompanied by police officers or soldiers at all times.
What they accomplished under those conditions is extraordinary.
Professor Stefan Hauser of Germany's University of Konstanz led an international team that deployed drone imagery, LiDAR laser scanning, and high-resolution geophysical surveys across the site. Researchers walked more than 500 kilometers of the surrounding area on foot, documenting pottery fragments and brick debris. The same technology that has recently uncovered lost Silk Road cities in Uzbekistan and hidden Maya settlements in Guatemala finally gave them a complete picture of what Alexander had actually built.
The city covers 2.5 square miles.
Hauser called that figure enormous for an ancient city. The residential blocks alone surpass those of the major capitals of the era. Temple complexes, workshops with kilns and furnaces, a harbor system, and a canal network emerged from the scans. The walls were found lying just beneath the surface – a millennium of desert conditions had preserved them almost perfectly.
"The quality of the geophysical evidence is absolutely stunning," Hauser told Fox News Digital. "The preservation of buildings is surprisingly good."
What This Tells Us About Alexander
The rediscovery of Alexandria on the Tigris does something beyond filling a gap in the map. It reveals the scale of what Alexander was actually building.
He didn't just conquer territory. He engineered the infrastructure of a continent-spanning economy. This city was the equivalent of a modern deepwater port – designed from scratch at the exact point where river commerce and ocean trade intersected. Hauser noted it functions as a precise Mesopotamian mirror of the famous Alexandria in Egypt: both cities placed deliberately where open sea meets river system.
That's not coincidence. That's a supply chain strategy laid out 2,300 years ago by a 30-year-old general.
The Parthian Empire – which controlled the city for centuries after Alexander's death – remains one of antiquity's most understudied powers. Hauser said the site is uniquely positioned to change that. Because no major construction has disturbed the ground since late antiquity, researchers have a rare chance to reconstruct a complete ancient city plan through geophysical work alone – something almost unheard of at a site this size.
Sources:
- Andrea Margolis, "Alexander the Great's long-lost city located after nearly two millennia: 'Absolutely stunning,'" Fox News, March 13, 2026.
- "New Research Confirms Location of Lost City Founded by Alexander the Great," Archaeology Magazine, February 10, 2026.
- "Lost City Founded by Alexander the Great Rediscovered After Centuries Beneath Iraq's Desert," Greek City Times, February 11, 2026.
- "Archaeologists Rediscover Alexandria on the Tigris, a Lost City Founded by Alexander the Great," Arkeonews, January 31, 2026.
- "Archaeologists Identify Long-Lost Alexandrian Port City in Southern Iraq," Archaeology News Magazine, February 2, 2026.