Baghdad is the Abbasid capital where Basim's story unfolds in Assassin's Creed Mirage.
Mirage is set in ninth-century Baghdad during the Islamic Golden Age. Basim Ibn Ishaq begins as a street thief and later joins the Hidden Ones, whose operations bring him into contact with the city's political, intellectual, and commercial life. The game emphasizes a concentrated urban map rather than the broad multi-region worlds of several recent entries.
Historical districts and landmarks shape the setting, including the Round City associated with the Abbasid capital. The game also presents the House of Wisdom and other locations connected to scholarship and administration, while its fictional narrative operates alongside the historical world of the Abbasid Caliphate.
Baghdad can be confused with Damascus, the major Syrian city featured in the first Assassin's Creed, or Constantinople, the setting of Assassin's Creed Revelations. Mirage also connects to Valhalla through Basim, but its main setting is a much earlier Baghdad, not the later medieval cities visited by other protagonists.