Aleppo is one of the oldest and largest castles in...

Aleppo is one of the oldest and largest castles in the world. The use of the hill on which the castle is located dates back to the third millennium BC, where it was later occupied by many civilizations including the Greeks, Byzantines, Mamluks and Ayyubids, while it appears that most of the current construction dates back to the Ayyubid period.