From wikipedia.com: ''Great Mosque of Aleppo (Jāmi‘ Bani Omayya al-Kabīr), founded c. 715 by Umayyad caliph Walid I and most likely completed by his successor Suleyman. The building contains a tomb associated with Zachary, father of John the Baptist. Construction of the present structure for Nur al-Din commenced in 1158. However, it was damaged during the Mongol invasion of 1260, and was rebuilt. The 45 m-high tower (described as "the principal monument of medieval Syria")was erected in 1090–1092 under the first Seljuk sultan, Tutush I. It has four façades with different styles.''