The Sovereign Military Hospitaller Order of Saint John of Jerusalem of Rhodes and of Malta (Italian: Sovrano Militare Ordine Ospedaliero di San Giovanni di Gerusalemme di Rodi e di Malta, Latin: Supremus Ordo Militaris Hospitalis Sancti Ioannis Hierosolymitani Rhodius et Melitensis), also known as the Sovereign Military Order of Malta (SMOM), Order of Malta or Knights of Malta, is a Roman Catholic lay religious order of, traditionally, a military, chivalrous and noble nature.