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 Choir "Any kind of guerilla action against Vatican II does not produce good fruits. The council's principles by now are untouchable." In 2010, Massimo Palombella, a Salesian priest, was appointed to replace Liberto as head of the choir. In September 2015, Deutsche Grammophon released a CD recorded in Sistine Chapel with the choir, the very first recording allowed there. Authorised by Pope Francis, he ruled that profits from sales of the album must be used for charity purposes only. On September 26, 2017, the Sistine Chapel Choir made their first visit to Canada, hosted by St. Michael's Choir School, at St.