Sistine Chapel ceiling "The whole world came running when the vault was revealed, and the sight of it was enough to reduce them to stunned silence." The frescoes of the Sistine Chapel were restored between June 1980 and December 1999, with preliminary tests taking place in 1979. The first stage of restoration, the work upon Michelangelo's lunettes, was achieved in October 1984. The work then proceeded on the ceiling, completed December 1989 and from there to the Last Judgement. The restoration was unveiled by Pope John Paul II on 8 April 1994. The restoration team comprised Gianluigi Colalucci, Maurizio Rossi, Piergiorgio Bonetti, Bruno
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