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
Restoration of the Sistine Chapel frescoes out of the gloom above the lunette of Jesse. Arguimbau says: Richard Serrin, in an essay entitled "Lies and Misdemeanors: Gianluigi Colalucci's Sistine Chapel Revisited" says: Carlo Pietrangeli, former Director General of the Vatican Museums, writes of the restoration: "It is like opening a window in a dark room and seeing it flooded with light." His words resonate with those of Giorgio Vasari who, in the 16th century, said of the Sistine Chapel ceiling: Pietrangeli, in his foreword to "The Sistine Chapel", written after the restoration of the lunettes, but prior to the restoration of the ceiling, commends those who