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 completed by four large corner "pendentives", each illustrating a dramatic Biblical story. The narrative elements of the ceiling illustrate that God made the World as a perfect creation and put humanity into it, that humanity fell into disgrace and was punished by death and by separation from God. Humanity then sank further into sin and disgrace, and was punished by the Great Flood. Through a lineage of Ancestors – from Abraham to Joseph – God sent the saviour of humanity, Christ Jesus. The coming of the Saviour was prophesied by Prophets of Israel and Sibyls of the Classical world. The