The Rediscovery Of The Sunken City Of Heracleoin

Explore the incredible discovery of Thonis-Heracleoin, Egypt’s real-life Atlantis. Dive deep into the history, catastrophic sinking and sunken treasures of this ancient Mediterranean port city lost for 1,200 years.

Staff Writer Mar 26, 2026 at 1146 Z

Updated: Mar 26, 2026 at 1339 Z

The Rediscovery Of The Sunken City Of Heracleoin
Ruin of the ancient city of Heracleoin in Egypt.

The rediscovery of the sunken city of Thonis-Heracleoin has transformed our understanding of ancient maritime history, proving that what was once considered a myth, was actually Egypt’s most vital Mediterranean gateway.

How Thonis-Heracleoin Was Found?

For over a millennium, this bustling metropolis existed only as a legend in the texts of historians like Herodotus and Strabo. Once famous as the primary port of Egypt, it vanished beneath the waves of Abu Qir Bay in the 8th century AD. It remained hidden from the world until 2000, when archaeologist Franck Goddio and the IEASM located the ruins 6.5 kilometres off the coast of Alexandria, bringing the “Egyptian Atlantis” back to light.

In 2000, when archaeologist Franck Goddio and the IEASM located the ruins 6.5 kilometres off the coast of Alexandria, bringing the “Egyptian Atlantis” back to light. Credits: Google

Solving Centuries Of Old Historical Riddle

This breakthrough did more than just rediscovering a lost city; it settled a long-standing academic debate. For years, scholars argued whether “Thonis” and “Heracleoin” were two separate locations. However, the discovery of a perfectly preserved black granite stele confirmed that they were the same location, known as Thonis to the Egyptians and as Heracleoin to the Greeks. Before the foundation of Alexandria in 331 BC, this city was the mandatory port of entry for all Greek ships, serving as both a wealthy customs hub and also known as a major religious sanctuary.

Remnants of a statue were also found during the excavation process of the ancient city. Credits: Google
 Colossal granite statues were found too during the excavation process. Credits: Google

Also Read: 5 reasons on why erechtheion is the real masterpiece of acropolis

Sunken Treasures And Recent Discoveries

As the city was rapidly buried under layers of protective silt, its artefacts remained frozen in time for 1,200 years. Although only about 5% of the site has been documented, the findings are staggering. Recent excavations have uncovered silver ritual instruments, gold jewellery and even 2,200 year old wicker baskets still filled with fruit. Alongside these delicate items are colossal 16-foot granite statues and the world’s largest ship graveyard, containing over 64 ancient vessels and 700 anchors.

Today, many of these recovered treasures are on display at the Grand Egyptian Museum in Cairo, where they continue to reshape our view of the ancient world. Credits: Google

Digital Preservation Of This Ancient History

The continuous work at Thonis-Heracleoin is now entering a high-tech phase. Researchers are using advanced geophysical prospecting and AI to create a “digital twin,” if the city, allowing for virtual exploration without disturbing the fragile seabed. Today, many of these recovered treasures are on display at the Grand Egyptian Museum in Cairo, where they continue to reshape our view of the ancient world.

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