Fortaleza de Aleppo (Síria)

Standing 50 meters high and covering a land area of 39,804 square meters, is a partly preserved fortress in Aleppo, Syria. The castle has undergone Crusader-era fortifications. According to research, the site had been used for various purposes in as early as the 3rd millennium B.C. It was subsequently occupied by the Greeks, the Byzantines, the Ayyubids, and the Mamluks. The existing structure was constructed by the Byzantines in the 13th century. The castle also served as a stronghold for the Crusader.