In which historical city does most of Assassin's Creed Revelations take place?

Most of Assassin's Creed Revelations takes place in Constantinople.

Released in 2011, Revelations follows Ezio Auditore after the events of Assassin's Creed Brotherhood. He travels to Constantinople, the capital of the Byzantine Empire, to search for keys connected to Altaïr's former headquarters in Masyaf and to confront a Templar presence in the city.

The game portrays Constantinople in the early sixteenth century, during the reign of Sultan Bayezid II. Important districts include Galata, Constantine, and the imperial center around landmarks such as Hagia Sophia. The setting lets the story connect Ezio's life with Altaïr's legacy.

Constantinople was officially renamed Istanbul in the twentieth century, but the historical setting and the game's title-era terminology use Constantinople. Athens and Alexandria are associated with other Assassin's Creed settings.