Restoration of the Sistine Chapel frescoes smoke and exhaust fumes of the city, being "much dirtier than the ceiling proper". The building was a little unstable and had already shifted considerably prior to Michelangelo's work of 1508, causing cracking of the ceiling, the crack in the "Judith" pendentive being so large that it had to be filled with bricks and mortar before painting. The upper part of the ceiling provided Michelangelo an irregular surface due to cracks and water seepage. Continued ingress of water from the roof and from unroofed exterior walkways above the ceiling level had caused seepage which carried down salts from the building
Sistine Chapel ceiling and passionate Christian beliefs. The Sistine Chapel is 40.9 metres long and 14 metres wide. The ceiling rises to 13.4 metres above the main floor of the chapel. The vault is of quite a complex design and it is unlikely that it was originally intended to have such elaborate decoration. Pier Matteo d'Amelia provided a plan for its decoration with the architectural elements picked out and the ceiling painted blue and dotted with gold stars, similar to that of the Arena Chapel decorated by Giotto at Padua. The chapel walls have three horizontal tiers with six windows in the upper