Mansurah, Al-

mansurah, al-, city located in the Egyptian Delta about 15 miles (24 km) northeast of al-Mahallah al-Kubra in the Daqahliyyah province. Al-Malik al-Kamil founded al-Mansurah in 1218/1219 when he was fighting the Crusaders in Dumyat (Maspero and Wiet, 1919, p. 198). Though Christianity is not attested in the city until the seventeenth century, al-Mansurah takes a prominent place in the annals of Christian history as the place where Louis IX suffered the defeat in 1249 that effectively spelled the end of the Crusades.