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 with wet straw and chemical additives — it means that no successful election has yet occurred. The first papal conclave to be held on the Sistine Chapel was the conclave of 1492, which took place from August 6 from August 11 of the same year and in which Pope Alexander VI, also known as Rodrigo Borja, was elected. The conclave also provided for the cardinals a space in which they could hear mass, and in which they could eat, sleep, and pass time attended by servants. From 1455, conclaves have been held in the Vatican; until the Great Schism, they