A 13th-century sonnet by one Durante (xcii.9-14) says that he was executed at Orvieto: "a ghiado it fe' morire a gran dolore, Nella corte di Roma ad Orbivieto."
XIII-wieczny tekst napisany przez Durante mówi, iż zginął on w egzekucji w Orvieto: "a ghiado it fe' morire a gran dolore, Nella corte di Roma ad Orbivieto."