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 with wet straw and chemical additives — it means that no successful election has yet occurred. The first papal conclave to be held on the Sistine Chapel was the conclave of 1492, which took place from August 6 from August 11 of the same year and in which Pope Alexander VI, also known as Rodrigo Borja, was elected. The conclave also provided for the cardinals a space in which they could hear mass, and in which they could eat, sleep, and pass time attended by servants. From 1455, conclaves have been held in the Vatican; until the Great Schism, they