Istanbul is the main modern name for the city that serves as Assassin's Creed Revelations' principal setting.
The game is set largely in Constantinople during the early sixteenth century, when the city was the capital of the Ottoman Empire. Ezio travels there while pursuing Altaïr's memories and searching for keys connected to the Masyaf fortress. The city includes districts such as Galata, Constantine, Imperial, and Bayezid.
Assassin's Creed Revelations was released in 2011 and concludes the main arc of Ezio Auditore. It also lets players control Altaïr in several memory sequences, linking the two characters' stories.
The title Constantinople is historically appropriate for the period and is the name commonly used in the game's setting descriptions. Istanbul became the city's official name in the twentieth century, so answers that identify only Athens, Rome, or Alexandria point to other Assassin's Creed settings.