How old is the aleppo citadel?

The Aleppo Citadel, located in Aleppo, Syria, has origins dating back to the 3rd millennium BC, making it over 4,000 years old. It has been continuously occupied and modified throughout various historical periods, including the Roman, Byzantine, and Islamic eras. The current structure largely reflects renovations and expansions that took place during the medieval period, particularly in the 12th century.