The ancient lighthouse on the island of Pharos and the Great Pyramid at Giza gave Egypt two of the Seven Wonders of the Ancient World. Historical records indicate that the lighthouse of Pharos was constructed around the same time as the Museum of Alexandria. However, despite its numerous depictions on surviving coins, artworks, and other artifacts little is certain beyond its basic structure, appearance, and impressive size. The geographer Strabo, who visited around 25 BCE, noted that it was made of dazzling white stone and was many stories tall. It served as a practical beacon for navigators and a symbolic beacon announcing the cultural riches of Alexandria. All ships entering the harbor passed by the lighthouse and a diverse complex of other structures and statues. Contemporary accounts suggest it had all of the characteristics of a major tourist attraction as well, with tours, food and even souvenir vendors. Arab sources indicate that the lighthouse endured until the 1300s, when it was destroyed by the last of a long series of earthquakes. Standing around 400 feet, it was the tallest building in the world for many centuries. Its innovative construction was imitated in many later buildings, including the minarets of mosques. Its ruins lay beneath the harbor waters, where excavation and study continue today.