Alexandria is an Egyptian Mediterranean port city. It was home to a lighthouse that was one of the Seven Wonders of the Ancient World, as well as a storied library, during the Hellenistic period. The library has been reborn as the disc-shaped, ultramodern Bibliotheca Alexandrina. There are also Greco-Roman ruins, old-world cafes, and sandy beaches in the city. Its seafront Qaitbay Citadel, built in the 15th century, is now a museum.