The Umm al-Nasr Mosque was built 1239 by the Ayyubids to commemorate their soldiers who had died in the battle on the mosque site between them and the Crusaders. The Ayyubids were victorious, hence the name Umm al-Nasr ("Mother of Victories").[1][2] The inscription on the wall above the mosque entrance attributes the construction to Ayyubid sultan al-Adil II.[3]