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 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 ladder. The word YES is printed on the piece of paper. The work is interactive, with the viewer (or participant) expected to climb the ladder and use a magnifying glass to look at the word 'YES' which is printed on paper beneath a sheet of glass suspended from the ceiling. The work was shown at Ono's autumn 1966 show, "Unfinished Paintings and Objects By