Teodoro de Celles was a 12th-century canon and crusader who established the Order of the Holy Cross. Born around 1166, he originally served as a canon at the cathedral chapter in Liège. Seeking a more disciplined community life and a way to serve the faithful, he left the chapter with four other members. In 1211, he founded the mother monastery of his new religious community at Clair-Lieu, located near Huy.
Life and work

Teodoro likely belonged to the noble family of Celles, situated between Namur and Liège. His decision to leave the Liège cathedral chapter may have been motivated by a desire for communal living or a protest against the worldly lifestyle of the clergy. The newly formed order focused on serving pilgrims, a primary mission that helped define the community's purpose during his leadership as the first general prior.
Veneration and legacy

The religious community he founded received official papal confirmation in 1248. He is recognized as a blessed in the Catholic Church, with his feast day observed on August 18. His influence continues through the order, which has named its European province after him since the year 2000.
