Sistine Chapel Ceiling - Method

Method

To reach the chapel's ceiling, Michelangelo designed his own scaffold, a flat wooden platform on brackets built out from holes in the wall near the top of the windows, rather than being built up from the floor. Mancinelli speculates that this was in order to cut the cost of timber. According to Michelangelo's pupil and biographer Ascanio Condivi, the brackets and frame that supported the steps and flooring were all put in place at the beginning of the work and a lightweight screen, possibly cloth, was suspended beneath them to catch plaster drips, dust and splashes of paint. Only half the building was scaffolded at a time and the platform was moved as the painting was done in stages. The areas of the wall covered by the scaffolding still appear as unpainted areas across the bottom of the lunettes. The holes were re-used to hold scaffolding in the latest restoration.

Contrary to popular belief, he painted in a standing position, not lying on his back. According to Vasari, "The work was carried out in extremely uncomfortable conditions, from his having to work with his head tilted upwards". Michelangelo described his physical discomfort in a humorous sonnet accompanied by a little sketch (see below).

The painting technique employed was fresco, in which the paint is applied to damp plaster. Michelangelo had been apprenticed in the workshop of Domenico Ghirlandaio, one of the most competent and prolific of Florentine fresco painters, at the time that the latter was employed on a fresco cycle at Santa Maria Novella and whose work was represented on the walls 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 how the work progressed. It was customary for fresco painters to use a full-sized detailed drawing, a cartoon, to transfer a design onto a plaster surface – many frescoes show little holes made with a stiletto, outlining the figures. Here Michelangelo broke with convention; once confident the intonaco had been well applied, he drew directly onto the ceiling. His energetic sweeping outlines can be seen scraped into some of the surfaces, while on others a grid is evident, indicating that he enlarged directly onto the ceiling from a small drawing.

Michelangelo painted onto the damp plaster using a wash technique to apply broad areas of colour, then as the surface became drier, he revisited these areas with a more linear approach, adding shade and detail with a variety of brushes. For some textured surfaces, such as facial hair and woodgrain, he used a broad brush with bristles as sparse as a comb. He employed all the finest workshop methods and best innovations, combining them with a diversity of brushwork and breadth of skill far exceeding that of the meticulous Ghirlandaio.

The work commenced at the end of the building furthest from the altar, with the latest of the narrative scenes, and progressed towards the altar with the scenes of the Creation. The first three scenes, from the story of Noah, contain a much larger number of small figures than the later panels. This is partly because of the subject matter, which deals with the fate of Humanity, but also because all the figures at that end of the ceiling, including the prophets and Ignudi, are smaller than in the central section. As the scale got larger, Michelangelo's style became broader, the final narrative scene of God in the act of Creation was painted in a single day.

The bright colours and broad, cleanly defined outlines make each subject easily visible from the floor. Despite the height of the ceiling the proportions of the Creation of Adam are such that when standing beneath it, "it appears as if the viewer could simply raise a finger and meet those of God and Adam". Vasari tells us that the ceiling is "unfinished", that its unveiling occurred before it could be reworked with gold leaf and vivid blue lapis lazuli as was customary with frescoes and in order to better link the ceiling with the walls below it which were highlighted with a great deal of gold. But this never took place, in part because Michelangelo was reluctant to set up the scaffolding again, and probably also because the gold and particularly the intense blue would have distracted from his painterly conception.

Some areas were, in fact, decorated with gold: the shields between the Ignudi and the columns between the Prophets and Sibyls. It seems very likely that the gilding of the shields was part of Michelangelo's original scheme since they are painted to resemble a certain type of parade shield, a number of which still exist and are decorated in a similar style with gold.

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