Giulio Romano (actually Giulio di Pietro Gianuzzi) was a painter and architect of the Mannerist style. He was trained in Raphael's workshop in Rome, where his existence was first attested in 1515. A close collaborator and friend of his master, he was involved in executing many of Raphael's frescoes and paintings, including the Vatican “Stanze” (Rapahel Rooms) and the Villa Farnesina. After Raphael's death in 1520, Giulio Romano, together with Gianfrancesco Penni, took over his master's workshop, thus ensuring that the studio continued to dominate the art world in Rome. Both worked for the Medici popes Clement VII and Leo X, and, in addtition, Giulio executed numerous altarpieces for Roman churches. He also took on some architectural projects that Raphael was unable to complete. Giulio's first architectural designs already show his turning away from Renaissance design principles and his inclination towards Mannerism. Giulio's 16 erotic drawings "I Modi", engraved by Marcantonio Raimondi and published with pornographic sonnets by Pietro Aretino, date from the 1520s. Raimondi was sentenced to prison, and the book was placed on the Vatican’s Index. In 1524, Giulio was summoned to the court of Mantua by Duke Federico II Gonzaga. In the following years, the Palazzo del Tè, a palace of leisure in the suburbs of the city, was built according to his designs. Giulio Romano himself decorated the palace with spectacular frescoes that today are considered his masterpiece. He also designed an extension with an inner courtyard for the ducal palace and oversaw the reconstruction of Mantua Cathedral after the building was destroyed by fire. In 1546, Giulio Romano was appointed architect of St Peter's Basilica. Shortly before he could leave Mantua for Rome, Giulio Romano died on 1 November 1546.