In which city does Assassin's Creed Revelations mainly take place?

Constantinople is the main setting of Assassin's Creed Revelations. The game follows Ezio Auditore as he travels to the Ottoman capital to search for Altaïr Ibn-La'Ahad's library keys.

The historical story takes place in the early sixteenth century, when Constantinople was a major center of the Ottoman Empire. The city is divided into districts that include areas such as Galata and the Imperial district. Ezio works with the local Assassins and becomes involved in tensions surrounding Sultan Bayezid II and the succession struggle involving his sons.

Revelations was released in 2011 and is the final main game centered on Ezio. It also contains playable sequences featuring Altaïr, linking the first game's protagonist with Ezio's later life. The city is sometimes called Istanbul in modern usage, but the game and its historical context use Constantinople for the period depicted.