Sistine Chapel ceiling Elijah's role as a prophet was one marked by accusation and warnings to repent, and the purpose of his translation into Heaven was traditionally seen as so that he might stand before God to condemn Israel for its sins. In four of the five most highly finished "medallions" the space is crowded with figures in violent action, similar to Michelangelo's cartoon for the "Battle of Cascina". The application of gold on the shields, in contrast to its absence on the rest of the ceiling, serves to link the ceiling to some extent with the frescoes around the walls. In the
Restoration of the Sistine Chapel frescoes have been predicted by previous restorers. One of the major dangers to the frescoes is automotive exhaust, and they are also vulnerable to the effects of the crowds of tourists that pass through the chapel every day, bringing with them heat, humidity, dust and bacteria (the latter of which can biodegrade paints and pigments). The clean plaster surfaces are more in danger from these destructive elements than they were when they were covered with a layer of smoky wax. Previously, the Sistine Chapel's only ventilation was from its windows in the upper level of the walls. To prevent exhaust fumes