This granite colossus was recovered through underwater excavations at the sunken city of Thonis-Heracleion (Abuqir Bay) that gradually disappeared under the waters of the Mediterranean due to a series of earthquakes and tidal waves. The colossus shows a Ptolemaic queen wearing a tripartite hair wig, a finely pleated dress and a shawl whose ends are knotted around her waist. A sun disk between two horns and a two-feathered crown above her head presents her as the goddess Isis. Together with another colossus representing a Ptolemaic king, the two statues originally stood outside a temple dedicated to god Amun-Gereb at Thonis-Heracleion. The archaeological material excavated from Thonis-Heracleion clearly reflects the importance of the now sunken city whose harbours once controlled all trade into Egypt.