 Complete the following phrase:  The building is well kept and nearly intact except for the western wing, which lies in ruins, and parts of the eastern wing. This is impressive considering the dry construction of the khan i.e., no mortar to bind the blocks together, and its location in the Jordan Rift Valley, an area prone to earthquakes. Throughout the existence of the khan there were two earthquakes: one in 1759, in which half of the Jews of Safed perished, and the 