Basim's home city in Assassin's Creed Mirage is Baghdad.
The game is set primarily in ninth-century Baghdad during the Islamic Golden Age. Basim begins as a street thief in Anbar, a district of the Abbasid capital, before joining the Hidden Ones and receiving training as an Assassin. The city is therefore both his personal starting point and the main setting for his transformation.
Mirage presents a concentrated urban environment rather than the enormous multi-region maps used by several earlier entries. Its districts include the Round City, Karkh, Abbasiyah, and the wilderness surrounding Baghdad. Historical figures and institutions from the Abbasid period are woven into the narrative.
Baghdad is sometimes confused with other Middle Eastern settings in the franchise. Damascus is prominent in the original Assassin's Creed, while Cairo appears in Assassin's Creed Origins. Mirage's ninth-century setting specifically centers on Abbasid Baghdad.