Sistine Chapel ceiling Rome to continue sculpting. The tomb sculptures, however, were never to be finished because in 1508 the pope returned to Rome victorious and summoned Michelangelo to begin work on the ceiling. The contract was signed on 10 May 1508. The scheme proposed by the pope was for twelve large figures of the Apostles to occupy the pendentives. However, Michelangelo negotiated for a grander, much more complex scheme and was finally permitted, in his own words, "to do as I liked". His scheme for the ceiling eventually comprised some three hundred figures and took four years to execute, being completed and
Illusionistic ceiling painting sotto in sù". This was the prototype of illusionistic ceiling painting that was to become an important element of Italian baroque. Correggio at Parma took the illusionistic ceiling a step farther in his frescoes of Christ and the Apostles for the cupola at the San Giovanni Evangelista and in the "Assumption of the Virgin" in the dome of the Cathedral of Parma, which is Correggio's most famous work (1520–24); in these frescos Correggio treats the entire surface as the vast and frameless vault of heaven in which the figures float. In a visual continuity between the architectural interior and its