The greatest artists of the time were in Rome to decorate the main church of the papacy. Great names as Botticelli, Ghirlandaio and Perugino worked in the room for two years painting the walls of the chapel with the stories of Moses and Jesus. Below these pictures are painted tapestries, and above pictures of popes.
What remains of this decoration are the sidewalls only.
The altar wall paintings were cancelled to house Michelangelo’s last judgment. While the main entrance wall was damaged when it collapsed in the fifteen hundred, therefore new paintings were realized by less important artists.
The picture shows you how the Sistine chapel looked like before Michelangelo interventions.