Restoration of the Sistine Chapel frescoes of the work. Based on this decision, according to Arguimbau's critical reading of the restoration data that has been provided, the chemists of the restoration team decided upon a solvent that would effectively strip the ceiling down to its paint-impregnated plaster. After treatment, only that which was painted "buon fresco" would remain. According to critics, the inherent problem with this approach is that it relied heavily upon an assumption that Michelangelo only painted "buon fresco", that he was always satisfied with the result at the end of the day, and that in four and a half years spent on the
Sistine Chapel three to get the width and by two to get the height. Maintaining the ratio, there were six windows down each side and two at either end. Defined proportions were a feature of Renaissance architecture and reflected the growing interest in the Classical heritage of Rome. The ceiling of the chapel is a flattened barrel vault springing from a course that encircles the walls at the level of the springing of the window arches. This barrel vault is cut transversely by smaller vaults over each window, which divide the barrel vault at its lowest level into a series of large