The restored Order of Hospitallers of St. Thomas of Canterbury at Acre is one of England's oldest orders of chivalry, and one of the oldest in Christendom. Founded in 1191 after the capture of Jerusalem by King Richard I, the Order was set up to tend to the ill and wounded and to bury Christian knights on the Crusades. During the Sixth Crusade, the Order was militarised by Peter of Roche, Bishop of Winchester. Dissolved by King Henry VIII in 1538, the restored Order is now under the protection of Houses Romanov and Pitt. 

Today, the Order exists for two purposes: to heal those suffering from mental health problems, and to grow and protect the Christian faith.