Al-Salt Castle is a ruined castle located in the city of Al-Salt in the Balqa Governorate, Jordan. It was built at the beginning of the 13th century AD by Al-Mu'azzam Isa, the Ayyubid sultan of Damascus, and the son of al-Malik al-Adil, the brother of Saladin, during the period of the Crusades. The castle was destroyed in 1834 AD during Ibrahim Pasha's campaign in Syria. Only the wall remains of the castle today, in addition to a cemetery for Ottoman soldiers and a mosque built of its stones. The site was inscribed as a UNESCO World Heritage Site in 2021 as part of As-Salt - The Place of Tolerance and Urban Hospitality.