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Vita Prima: Soon after the canonization of Francis in 1228,
Pope Gregory IX commissioned Thomas to write the
Vita Beati Francisci ("The Life of Blessed Francis"; often called the "First Life"), a work on the saint's early life. Thomas's authorship of the three works on Francis of Assisi is well-established. Many researchers of the early history of the Franciscan order believe that
Brother Leo, and
Rufinus of Assisi, associates of Francis, were the source of the material for the
Vita Secunda. Thomas also wrote
Fregit victor virtualis and
Sanctitatis nova signa in honor of Francis.
Life of St. Clare of Assisi, on the early life of
Saint Clare of Assisi, and the hymn "
Dies Irae" are also traditionally attributed to him, but the authorship of both works is in fact uncertain.
Death and burial In 1260 he settled down to his last post, as spiritual director to a convent of Clarisses in
Tagliacozzo, where he died some time between 1260 and 1270. He was at first buried in the church of S. Giovanni Val dei Varri, attached to his monastery, but his body is now reburied in the church of S. Francesco at Tagliacozzo. ==Beatification process==