Muallaq Mosque. The building had been used as a synagogue; after Zahir converted it for Muslim use, he compensated the Jewish worshippers with property elsewhere in the city. The Zaytuna Mosque was built in Acre during his rule at the initiative of Hajj Muhammad al-Sadiq, or the local scholar Muhammad Shadi al-Farid, who financed its construction. Nazareth Zahir built the Seraya government house in Nazareth, which served as the city's municipal headquarters until 1991. Haifa Between 1765 and 1769, Zahir had Haifa demolished and rebuilt and fortified at a site to the southeast. While the old village was situated on a plain, the new town, which remained a port along the Haifa Bay, was built on a narrow strip of land at the northern foot of Mount Carmel to make it easier to defend by land. In the new Haifa, Zahir built a wall around the town with four towers and two gates, none of which are extant. They existed at least until the early 19th century when David Roberts described and sketched the wall. Within Haifa, Zahir built Burj al-Salam, a two-story square tower, which remained intact until the 1970s. The original great mosque in new Haifa was probably built by Zahir, but most of the present building is a later construction. He also built a customs building and a (government residence). The remains of the consist of a few cross-vaults lying on square pillars in a car park, while the eastern section of the structure is used for warehousing. Tiberias Zahir built fortifications around Tiberias in 1739–1740. Part of the walls originally ran along the shore of the Sea of Galilee and had eighteen towers. The fortifications were severely damaged in the 1837 earthquake. Most of the walls have been destroyed or form part of modern structures, while eight of the towers are extant. The two-story square citadel with its four-round towers, located at the northeastern section of the fortifications, remains extant. Both stories of the citadel are characterized by three rows of cross vaults. The citadel was built by Zahir's son Salibi. As of 2001, the upper floor was operated as a restaurant, while the lower floor contained an art gallery. The citadel is locally often misidentified as the "Crusader castle/fortress". In the present center of Tiberias, Zahir built a mosque, known after him as the Omari Mosque or the Zahiri Mosque. It consists of a prayer