The Sistine Chapel was commissioned by Pope Sixtus IV in the 1470s and was built on the foundation of an older chapel, the Capella Magna. The chapel was erected by the architect Giovanni dei Dolci and was named after Pope Sixtus IV. The chapel is famous for its Renaissance frescoes by many Florentine Renaissance masters, including Michelangelo. Between 1508 and 1512, under the patronage of Pope Julius II, Michelangelo painted the chapels ceiling, a project that changed the course of Western art. The Last Judgment fresco on the west wall was painted by Michelangelo for Pope Paul III in the period from 1534 to 1541.