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
Sistine Chapel layer of animal glue and "lamp black", all of the wax, and all of the overpainted areas were contamination of one sort or another: smoke deposits, earlier restoration attempts, and painted definition by later restorers in an attempt to enliven the appearance of the work. Based on this decision, according to Arguimbau's critical reading of the restoration data that have been provided, the chemists of the restoration team decided upon a solvent that would effectively strip the ceiling down to its paint-impregnated plaster. After treatment, only that which was painted "buon fresco" would remain. The only reproduction of the Sistine