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
Ceiling Painting/Yes Painting affirmation has been likened by Ono to the intimidating stature of a cathedral. The relationship between "Ceiling Painting/Yes Painting" and Ono's 1964 work "Cut Piece" was extensively critiqued by James M. Harding in his essay "Between Material and Matrix: Yoko Ono's "Cut Piece" and the Unmaking of Collage" in his 2012 book of essays, "Cutting Performances: Collage Events, Feminist Artists, and the American Avant-Garde". Ceiling Painting/Yes Painting Ceiling Painting/Yes Painting is a 1966 conceptual artwork by the Japanese artist Yoko Ono. The work is made from paper, glass, a metal frame, a metal chain, a magnifying glass, and a painted