This photo taken on Aug. 20, 2025 shows artifacts during an exhibition of sunken antiquities recovered from the Mediterranean Sea at Alexandria National Museum in Alexandria, Egypt. Egypt opened on Wednesday an exhibition of sunken antiquities at the Alexandria National Museum, showcasing treasures from the Mediterranean seabed. Dubbed the "Secrets of the Sunken City Exhibition," the exhibition showcased 86 rare artifacts recovered from several sites in Alexandria, including the two submerged cities of Thonis-Heracleion and Canopus, and the submerged Royal Quarter in the Eastern Harbor of ancient Alexandria. (Xinhua/Sui Xiankai)

ALEXANDRIA, Egypt, Aug. 20 (Xinhua) -- Egypt opened on Wednesday an exhibition for sunken antiquities at the Alexandria National Museum, showcasing treasures from the Mediterranean seabed.

Dubbed the "Secrets of the Sunken City Exhibition," the exhibition showcased 86 rare artifacts recovered from several sites in Alexandria, including the two submerged cities of Thonis-Heracleion and Canopus, and the submerged Royal Quarter in the Eastern Harbor of ancient Alexandria.

According to the Egyptian Tourism and Antiquities Ministry, Thonis-Heracleion, a once-flourishing port city active between the 6th century BC and 4th century AD, gradually sank over the centuries due to earthquakes, land subsidence and rising sea levels. It was known for its multiple harbors and Egyptian and Greek temples, including Amun, Khonsu and Heracles.

The submerged city of Canopus was renowned for its sacred sanctuaries dedicated to Osiris and Serapis. The city was also known for its extravagant celebrations during the Roman era, the ministry said. ■

This photo taken on Aug. 20, 2025 shows an artifact during an exhibition of sunken antiquities recovered from the Mediterranean Sea at Alexandria National Museum in Alexandria, Egypt.

Egypt opened on Wednesday an exhibition of sunken antiquities at the Alexandria National Museum, showcasing treasures from the Mediterranean seabed.

Dubbed the "Secrets of the Sunken City Exhibition," the exhibition showcased 86 rare artifacts recovered from several sites in Alexandria, including the two submerged cities of Thonis-Heracleion and Canopus, and the submerged Royal Quarter in the Eastern Harbor of ancient Alexandria. (Xinhua/Sui Xiankai)

This photo taken on Aug. 20, 2025 shows artifacts during an exhibition of sunken antiquities recovered from the Mediterranean Sea at Alexandria National Museum in Alexandria, Egypt.

Egypt opened on Wednesday an exhibition of sunken antiquities at the Alexandria National Museum, showcasing treasures from the Mediterranean seabed.

Dubbed the "Secrets of the Sunken City Exhibition," the exhibition showcased 86 rare artifacts recovered from several sites in Alexandria, including the two submerged cities of Thonis-Heracleion and Canopus, and the submerged Royal Quarter in the Eastern Harbor of ancient Alexandria. (Xinhua/Ahmed Gomaa)

This photo taken on Aug. 20, 2025 shows artifacts during an exhibition of sunken antiquities recovered from the Mediterranean Sea at Alexandria National Museum in Alexandria, Egypt.

Egypt opened on Wednesday an exhibition of sunken antiquities at the Alexandria National Museum, showcasing treasures from the Mediterranean seabed.

Dubbed the "Secrets of the Sunken City Exhibition," the exhibition showcased 86 rare artifacts recovered from several sites in Alexandria, including the two submerged cities of Thonis-Heracleion and Canopus, and the submerged Royal Quarter in the Eastern Harbor of ancient Alexandria. (Xinhua/Ahmed Gomaa)

This photo taken on Aug. 20, 2025 shows an artifact during an exhibition of sunken antiquities recovered from the Mediterranean Sea at Alexandria National Museum in Alexandria, Egypt.

Egypt opened on Wednesday an exhibition of sunken antiquities at the Alexandria National Museum, showcasing treasures from the Mediterranean seabed.

Dubbed the "Secrets of the Sunken City Exhibition," the exhibition showcased 86 rare artifacts recovered from several sites in Alexandria, including the two submerged cities of Thonis-Heracleion and Canopus, and the submerged Royal Quarter in the Eastern Harbor of ancient Alexandria. (Xinhua/Sui Xiankai)

Sherif Fathy (2nd R, front), Egyptian Minister of Tourism and Antiquities, views artifacts during an exhibition of sunken antiquities recovered from the Mediterranean Sea at Alexandria National Museum in Alexandria, Egypt, on Aug. 20, 2025.

Egypt opened on Wednesday an exhibition of sunken antiquities at the Alexandria National Museum, showcasing treasures from the Mediterranean seabed.

Dubbed the "Secrets of the Sunken City Exhibition," the exhibition showcased 86 rare artifacts recovered from several sites in Alexandria, including the two submerged cities of Thonis-Heracleion and Canopus, and the submerged Royal Quarter in the Eastern Harbor of ancient Alexandria. (Xinhua/Ahmed Gomaa)

This photo taken on Aug. 20, 2025 shows artifacts during an exhibition of sunken antiquities recovered from the Mediterranean Sea at Alexandria National Museum in Alexandria, Egypt.

Egypt opened on Wednesday an exhibition of sunken antiquities at the Alexandria National Museum, showcasing treasures from the Mediterranean seabed.

Dubbed the "Secrets of the Sunken City Exhibition," the exhibition showcased 86 rare artifacts recovered from several sites in Alexandria, including the two submerged cities of Thonis-Heracleion and Canopus, and the submerged Royal Quarter in the Eastern Harbor of ancient Alexandria. (Xinhua/Ahmed Gomaa)