Sistine Chapel ceiling of the Sistine Chapel. At the outset, the plaster, "intonaco", began to grow mold because it was too wet. Michelangelo had to remove it and start again. He then tried a new formula created by one of his assistants, Jacopo l'Indaco, which resisted mold and entered the Italian building tradition. Because he was painting "fresco", the plaster was laid in a new section every day, called a "giornata". At the beginning of each session, the edges would be scraped away and a new area laid down. The edges between "giornate" remain slightly visible; thus, they give a good idea of
Sistine Chapel ceiling completed by four large corner "pendentives", each illustrating a dramatic Biblical story. The narrative elements of the ceiling illustrate that God made the World as a perfect creation and put humanity into it, that humanity fell into disgrace and was punished by death and by separation from God. Humanity then sank further into sin and disgrace, and was punished by the Great Flood. Through a lineage of Ancestors – from Abraham to Joseph – God sent the saviour of humanity, Christ Jesus. The coming of the Saviour was prophesied by Prophets of Israel and Sibyls of the Classical world. The