 It is famous as the birthplace (more specifically Civita di Bagnoregio) of the philosopher St. Bonaventure in the early 13th century.Writer Bonaventura Tecchi also hailed from Bagnoregio.The mention in a letter of Pope Gregory the Great of a John newly elected as bishop of Bagnoregio is the earliest extant mention of a bishop of the see of Bagnoregio, but he was doubtlessly not the first bishop.