Sistine Chapel ceiling ceiling include the four so-called Major prophets: Isaiah, Jeremiah, Ezekiel and Daniel. Of the remaining possibilities among the Twelve Minor Prophets, the three represented are Joel, Zechariah and Jonah. Although the prophets Joel and Zechariah are considered "minor" because of the comparatively small number of pages that their prophecy occupies in the Bible, each one produced prophesies of profound significance. They are often quoted, Joel for his "Your sons and your daughters shall prophesy, your elderly shall dream dreams and your youth shall see visions". These words are significant for Michelangelo's decorative scheme, where women take their place among men
Restoration of the Sistine Chapel frescoes to the Last Judgment. The restoration was unveiled by Pope John Paul II on 8 April 1994. The final stage was the restoration of the wall frescoes, approved in 1994 and unveiled on 11 December 1999. The aims of the conservators were as follows: In 1979 Colalucci undertook a series of experiments to discover the right approach for the restoration of the frescoes of the Sistine Chapel. The investigation began by testing small areas of the wall fresco, "Conflict over the Body of Moses" by Matteo de Lecce, which had similar physical and chemical attributes to the painting techniques employed