Passage: In 1099, Jerusalem was captured by the Western Christian army of the First Crusade and it remained in their hands until recaptured by the Arab Muslims, led by Saladin, on October 2, 1187.  He summoned the Jews and permitted them to resettle in the city. In 1219, the walls of the city were razed by Mu'azzim Sultan of Damascus; in 1229, by treaty with Egypt, Jerusalem came into the hands of Frederick II of Germany. In 1239 he began to rebuild the walls, but they were demolished again by Da'ud, the emir of Kerak. In 1243, Jerusalem came again under the control of the Christians, and the walls were repaired. The Kharezmian Tatars took the city in 1244 and Sultan Malik al-Muazzam razed the walls, rendering it again defenseless and dealing a heavy blow to the city's status.

Question: After having its walls repaired by the Christians, what city's walls were razed in 1244 by Sultan al-Muazzam?
Jerusalem