Italian Renaissance painting
In 1508 Pope Julius II succeeded in getting the Florentine sculptor Michelangelo (1475-1564) to agree to continue the decorative scheme of the Sistine Chapel. The Sistine Chapel ceiling was constructed in such a way that there were twelve sloping pendentives supporting the vault that formed ideal surfaces on which to paint the Twelve Apostles. Michelangelo soon devised an entirely different scheme, far more complex both in design and in iconography. The scale of the work, which he executed single handed except for manual assistance, was titanic and took nearly five years to complete.
Restoration of the Sistine Chapel frescoes
On some of the figures, however, there still remains clear evidence of painting in carbon black. The apparent explanation for this is that over the long period that Michelangelo was at work, he probably, for a variety of reasons, varied his technique. Things that might affect the degree of finish achieved on a particular "giornata" include the heat and humidity of the day and the length of daylight hours. Whatever the reason for the difference is, a difference in approach to the light and shade on the individual figures is clearly apparent.