Mendicant Orders in the Medieval World – The Metropolitan Museum of Art https://www.metmuseum.org/essays/mendicant-orders-in-the-medieval-world
Their personal maxim was: sibi soli vivere sed et aliis proficere (“not to live for themselves only but to serve others”).
Saint Peter Martyr in an Initial P, from a Gradual South Italian ca. 1270–80 The Man