In the city centre, the great mosque is distinctive. It was built by el-Jezzar in 1781. His and his son's tombs are placed in the courtyard. The marble columns in the courtyard were looted from Caesarea. A visit to the vaults under the mosque is a spooky experience.
Stairs lead down there from the courtyard.
The huge cellars form the basement of what was once a Crusader church. The Crusader city was some 7-8 meters lower than the current city. The actual building used to be a ruin, which was erected again by the Turks. The Knights's halls are reached by passing a Turkish gate. Only three of the seven halls are open to the public.