The Pope is the Bishop of Rome and its official seat is the Archbasilica of Saint John Lateran (of which the President of the French Republic is ''ex officio'' the "first and only honorary canon", a title held by the heads of the French state since King Henry IV of France). Another body, the Sovereign Military Order of Malta (SMOM), took refuge in Rome in 1834, due to the conquest of Malta by Napoleon in 1798. It is sometimes classified as having sovereignty but does not claim any territory in Rome or anywhere else, hence leading to dispute over its actual sovereign status.