scores. Ottaviano Petrucci, who had overcome practical difficulties in the way of using movable type to print musical notation, obtained from Leo X the exclusive privilege of printing organ scores (which, according to the papal brief, "adds greatly to the dignity of divine worship") for a period for 15 years from 22 October 1513. In addition to fostering the performance of sung Masses, he promoted the singing of the Gospel in Greek in his private chapel. Unworthy pursuits Even those who defend him against the more outlandish attacks on his character acknowledge that he partook of entertainment such as masquerades, "jests," fowling, and hunting boar and other wild beasts. According to one biographer, he was "engrossed in idle and selfish amusements". Leo indulged buffoons at his Court, but also tolerated behavior which made them the object of ridicule. One case concerned the conceited improvisatore Giacomo Baraballo, Abbot of Gaeta, who was the butt of a burlesque procession organised in the style of an ancient Roman triumph. Baraballo was dressed in festal robes of velvet and with ermine and presented to the pope. He was then taken to the piazza of St Peter's and was mounted on the back of Hanno, a white elephant, the gift of King Manuel I of Portugal. The magnificently ornamented animal was then led off in the direction of the Capitol to the sound of drums and trumpets. But while crossing the bridge of Sant'Angelo over the Tiber, the elephant, already distressed by the noise and confusion around him, shied violently, throwing his passenger onto the muddy riverbank below. Sexuality Leo's most recent biographer, Carlo Falconi, says Leo hid a private life of moral irregularity behind a mask of urbanity. Scabrous verse libels of the type known as pasquinades were particularly abundant during the conclave which followed Leo's death in 1521 and made imputations about Leo's unchastity, implying or asserting homosexuality. Suggestions of homosexual attraction appear in works by two contemporary historians, Francesco Guicciardini and Paolo Giovio. Zimmerman notes Giovio's "disapproval of the pope's familiar banter with his chamberlains – handsome young men from noble families – and the advantage he was said to take of them." Luther spent a month in Rome in 1510, three years before Leo became pontiff, and was disillusioned at the corruption he found there. In 1520, the year before his excommunication from the Catholic Church, Luther claimed that Leo lived