Sistine Chapel ceiling Church as the agent of God. To be outside the Church was to be beyond "Salvation". In the ceiling of the Sistine Chapel, Michelangelo presented both Catholic and Humanist elements in a way that does not appear visually conflicting. The inclusion of "non-biblical" figures such as the Sibyls or "Ignudi" is consistent with the rationalising of Humanist and Christian thought of the Renaissance. This rationalisation was to become a target of the Counter Reformation. The iconography of the ceiling has had various interpretations in the past, some elements of which have been contradicted by modern scholarship. Others, such as 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