Another sect of French origin (near Chartres), this group was another reform of Benedictinism, named for their use of tirones (apprentices, similar to the Cistercian 'conversi'). There were 5 priories in England, St. Dogmael's, in Wales, being pre-eminent. Modern remains can be seen at St. Dogmael's and at Caldey (an island off the southwestern tip of Wales).