Sistine Chapel ceiling
The work took over four years to complete between 1536 and 1541 (preparation of the altar wall began in 1535). Michelangelo began working on it twenty-five years after having finished the Sistine Chapel ceiling, and was nearly 67 at its completion. He had originally accepted the commission from Pope Clement VII, but it was completed under Pope Paul III whose stronger reforming views probably affected the final treatment.