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 Michael's Cathedral Basilica. Sistine Chapel Choir The Sistine Chapel Choir, as it is generally called in English, or properly the "Coro della Cappella Musicale Pontificia" in Italian, is one of the oldest choirs in the world, having been formally active since 1471. Based in Vatican City, it normally comprises twenty men (tenors and basses) and thirty boys (sopranos and altos), the latter receiving free tuition. As early as in the pontificate of Sylvester I (314–35), a regularly constituted company of singers, under the name of "schola cantorum", lived together in a building devoted to their exclusive use. The word ""schola""