
Ajloun Castle was built by one of Saladin's generals in 1184 AD to control the iron mines of Ajloun and to deter the Franks from invading Ajloun Ajloun castle dominated the three main routes leading to the Jordan Valley and protected the trade and commercial routes between Jordan and Syria; it became an important link in the defensive chain against the Crusaders, who, unsuccessfully spent decades trying to capture the castle and the nearby village. The original castle had four towers, arrow slits incorporated into the thick walls, and was surrounded by a moat averaging 16m in width and up to 15m deep. In 1215 AD, the Mameluk officer Aibak ibn Abdullah expanded the castle following Usama's death, by adding a new tower in the southeast corner and a bridge that can still be seen decorated with pigeon reliefs.