Sistine Chapel ceiling known as the Papal Chapel who would observe the decorations and interpret their theological and temporal significance, it was Pope Julius' intention and expectation that the iconography of the ceiling was to be read with many layers of meaning. Michelangelo, who was not primarily a painter but a sculptor, was reluctant to take on the work. Also, he was occupied with a very large sculptural commission for the pope's own tomb. The pope was adamant, leaving Michelangelo no choice but to accept. But a war with the French broke out, diverting the attention of the pope, and Michelangelo fled from
Sistine Chapel congregations. These included the Christmas Day and Easter masses, at which the Pope himself was the celebrant. The other 27 masses could be held in a smaller, less public space, for which the "Cappella Maggiore" was used before it was rebuilt on the same site as the Sistine Chapel. The "Cappella Maggiore" derived its name, the Greater Chapel, from the fact that there was another chapel also in use by the Pope and his retinue for daily worship. At the time of Pope Sixtus IV, this was the Chapel of Pope Nicholas V, which had been decorated by Fra Angelico.