Sistine Chapel ceiling and the relatively conservative concept of the relationship between Eve and her Creator adheres closely to Jacopo's design. Other panels on the ceiling, most particularly the iconic "Creation of Adam" show "... unprecedented invention". The ceiling of the Sistine Chapel was to have a profound effect upon other artists, even before it was completed. Vasari, in his Life of Raphael, tells us that Bramante, who had the keys to the chapel, let Raphael in to examine the paintings in Michelangelo's absence. On seeing Michelangelo's prophets, Raphael went back to the picture of the Prophet Isaiah that he was painting on
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.