Sistine Chapel ceiling reread the Old Testament while he was painting the ceiling, drawing his inspiration from the words of the scripture, rather than from the established traditions of sacral art. A total of 343 figures were painted on the ceiling. To reach the chapel's ceiling, Michelangelo designed his own scaffold, a flat wooden platform on brackets built out from holes in the wall near the top of the windows, rather than being built up from the floor. Mancinelli speculates that this was in order to cut the cost of timber. According to Michelangelo's pupil and biographer Ascanio Condivi, the brackets and frame
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