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 ceiling various components of the ceiling are linked to this Christian doctrine. Traditionally, the Old Testament was perceived as a prefiguring of the New Testament. Many incidents and characters of the Old Testament were commonly understood as having a direct symbolic link to some particular aspect of the life of Jesus or to an important element of Christian doctrine or to a sacrament such as Baptism or the Eucharist. Jonah, for example, was readily recognisable by his attribute of the large fish and was commonly seen to symbolise Jesus' death and resurrection. While much of the symbolism of the ceiling dates