Sistine Chapel ceiling of the chapel, now closed, and those above the High Altar covered by the Last Judgement. Above each window is an arched shape, referred to as a lunette and above eight of the lunettes at the sides of the chapel are triangular "spandrels" filling the spaces between the side pendentives and the vault, the other eight lunettes each being below one of the corner pendentives. Michelangelo was commissioned to paint these areas as part of the work on the ceiling. The structures form visual bridges between the walls and the ceiling, and the figures which are painted on them are
Restoration of the Sistine Chapel frescoes the summer and winter months so that changes to the atmospheric environment occur gradually. The air near the ceiling is kept at a temperate level, while the air in the lower section of the building is cooler and circulates more rapidly, with the effect that dirt particles fall towards the floor rather than being streamed upwards. Bacteria and chemical pollutants are filtered out. Environmental specifications: When the restoration of the Sistine Chapel was announced, it sparked a barrage of queries and objections from art historians around the world. One of the most vocal of these critics was James Beck, of