A Bull Regarding the Abuse of Monastic Lands, Issued by Leo X, Whose Sale of Indulgences Helped Bring on the Reformation (PAPAL BULL ON VELLUM). POPE LEO X. CONCERNING THE DISPUTED USE OF LAND LEGALLY OWNED BY THE MONASTERY OF SAINTS GIACOMO AND FILIPPO IN THE ITALIAN CITY OF ASTI. Rome: 13 July 1518. Price: $6,500.00 Add to Cart Add to Wish List Ask a Question