In Assassin's Creed Origins, Alexandria serves as the game's largest urban center.
Alexandria is a major city in the game's version of Ptolemaic Egypt and a central location in Bayek's investigation. It contains dense streets, grand architecture, markets, ports, and landmarks associated with the city's Hellenistic and Egyptian cultures. The Library of Alexandria and the Pharos lighthouse are especially prominent historical references.
The game begins in Siwa, Bayek's home region, and later takes him across Egypt. Memphis is another important city, while Cyrene is a major settlement in the western part of the world map. These locations can make city-size comparisons seem ambiguous, but Alexandria is presented as the largest and most cosmopolitan urban center.
Historically, Alexander the Great founded Alexandria in 331 BC. Under the Ptolemaic dynasty, it became a powerful Mediterranean port and an intellectual center. Origins is set in the first century BC, during the reign of Cleopatra VII.