Grégoire VII., Saint Fran₆cois d'Assise, Saint Thomas d'Aquin /
Delécluze, E. J.(Etienne Jean),1781-1863.
Paris : Labitte,
1844.
Gregory VII, Pope, approximately 1015-1085.
Francis, of Assisi, Saint, 1182-1226.
Thomas, Aquinas, Saint, 1225?-1274.