Nearly 2,000 years after an ancient royal palace disappeared beneath the Mediterranean Sea, archaeologists surveying its ruins have recovered a bronze ring bearing the image of a monument that no longer exists.
The engraving depicts the Lighthouse of Alexandria, a towering structure that once guided ships into Egypt’s most important Mediterranean harbor. Considered one of the Seven Wonders of the Ancient World, the lighthouse endured for more than a thousand years before earthquakes eventually reduced it to ruins.
Although the discovery represents the first known signet ring depicting the famous lighthouse, archaeologists believe its location could be even more significant.
Found among the submerged remains of a royal palace, the artifact may provide evidence of the administrative system that operated one of antiquity’s greatest engineering achievements.
The ring was recovered during underwater excavations on Antirhodos, an island that once formed part of Alexandria’s royal quarter. The European Institute for Underwater Archaeology (IEASM), led by French underwater archaeologist Franck Goddio, is investigating in collaboration with Egypt’s Ministry of Tourism and Antiquities.
According to the excavation team, the discovery suggests the royal palace once housed offices that performed administrative functions, potentially including managing the lighthouse.
“This discovery is exceptional, as it is the first time that a picture of the lighthouse has been found engraved on a seal ring,” Dr. Hisham El-Lithi, the Egyptian Secretary-General of the Supreme Council of Antiquities, said in a statement. “[This] may indicate that the Antirhodos Palace, which was seen and described by the historian and geographer Strabo during his visit to Egypt between 29 and 25 BC, may have been used until the second century AD for administrative purposes, which may include what is related to the management of the lighthouse.”
A Lost Wonder That Dominated the Ancient World
Constructed during the third century BC under Egypt’s Ptolemaic dynasty, the Lighthouse of Alexandria stood on the island of Pharos, near the entrance to the city’s Great Harbor.
Estimates of its original height vary, but the structure may have reached approximately 330 to 430 feet, making it one of the tallest human-made structures of antiquity.
Yet, its enormous size served a practical purpose. Alexandria was a major center of Mediterranean commerce, connecting Egyptian agricultural production and international trade networks with merchants traveling throughout the ancient world.
However, for approaching ships, Egypt’s relatively flat coastline and dangerous offshore shallows presented considerable navigational hazards. The lighthouse provided a highly visible landmark, helping vessels identify the harbor entrance.
Ancient descriptions and surviving coins suggest the structure consisted of three principal sections: a square lower tower, an octagonal middle section, and a cylindrical upper level.
The newly recovered ring bears an image resembling the lighthouse depicted on Roman-era coins dating to the second century AD.
Those similarities offer archaeologists another surviving depiction of the lost monument, although the excavation team has not established a definitive date for the ring itself.
The lighthouse survived into the medieval period before a succession of earthquakes severely damaged it. During the 15th century, the Mamluk sultan Qaitbay constructed a fortress on its former site, incorporating stone from the ruined structure.
Could the Ring Have Belonged to an Ancient Official?
While the lighthouse engraving makes the ring unusual, its possible function raises another question: who could have worn it?
In antiquity, signet rings were more than decorative objects. Their engraved surfaces could be pressed into wax or clay, producing distinctive impressions used to authenticate documents, secure correspondence, or identify property.
Such objects could therefore serve as personal identifiers or instruments of administrative authority. The newly discovered ring may have performed a similar function, and its recovery from Antirhodos is especially intriguing, since the island was once home to the elaborate Antirhodos Palace complex associated with Alexandria’s rulers.
The Greek geographer Strabo described the palace during his visit to Egypt between 29 and 25 BC, documenting a royal residence surrounded by the city’s extensive harbor infrastructure.
Centuries later, the island and portions of Alexandria’s ancient waterfront disappeared beneath the Mediterranean following a combination of geological changes, earthquakes, and destructive sea waves.
Goddio’s team has spent decades investigating the submerged ruins, identifying temples, statues, architectural remains, and objects associated with everyday life in the royal quarter.
Excavations on Antirhodos have revealed structures covering tens of thousands of square feet.
The ring’s discovery raises the possibility that parts of the palace continued functioning as administrative offices long after the era of the Ptolemaic monarchs.
However, researchers have yet to identify the ring’s owner or determine whether it served an official purpose. Given the lighthouse’s prominence as a symbol of Alexandria, the ring could just as easily have been a personal possession worn for its decorative appeal.
Reconstructing the History of a Sunken City
The ring is one of several discoveries emerging from ongoing investigations of Alexandria’s submerged royal quarter.
During the current excavation season, archaeologists have also recovered pottery, glass vessels, amphorae, and household objects dating from the fourth century BC through the fourth century AD.
The team’s work includes investigations around the Temple of Isis, the royal palace on Antirhodos, and the Timonium, a complex associated with Mark Antony.
Together, these discoveries are helping researchers reconstruct the layout and changing functions of a waterfront district that was once located at the center of Mediterranean political and commercial life.
The bronze ring offers a particularly rare connection between Alexandria’s surviving archaeological remains and one of its most celebrated lost structures.
Unlike the massive stone blocks scattered beneath the sea near the lighthouse’s former location, the ring preserves an image of the monument as ancient people themselves represented it.
And because it was discovered within a former center of royal power, the artifact may eventually reveal how the people responsible for maintaining one of the ancient world’s most remarkable structures carried out their work.
Dr. El-Lithi stressed the broader significance of the discoveries, explaining that they “contribute to enriching knowledge of the history of Alexandria and shedding more light on different aspects of its history and civilization throughout the ages.”
Tim McMillan is a retired law enforcement executive, investigative reporter and co-founder of The Debrief. His writing typically focuses on defense, national security, the Intelligence Community and topics related to psychology. You can follow Tim on Twitter: @LtTimMcMillan. Tim can be reached by email: tim@thedebrief.org or through encrypted email: LtTimMcMillan@protonmail.com