Gilbert D'aissailly

Gilbert of Assailly (died 1183) was the master of the Knights Hospitaller, serving from 1162 or 1163 to 1170, when he was deposed. As Grand Master, he succeeded Auger de Balben (rather than Arnaud de Comps that some compilations listed). Nevertheless, most sources list him as the fifth, rather than fourth, master and this biography continues that tradition, with the exception being Delaville Le Roulx' work. He was succeeded by Gastone de Murols.

Gilbert encouraged Amalric of Jerusalem in his unsuccessful invasion of Egypt, leaving the Order in debt and causing the reexamination of its military role.