The cleaning and restoration of Michelangelo's frescoes on the ceiling of the Sistine Chapel were performed by some of the world's best art restoration experts under the close supervision of a group of international artists and history experts. However, a result Controversial storm. Most modern visitors seem to be accustomed to watching these colors have been dulled by yellowed glue and dust, and the outlines of characters have been blurred by dirt accumulated over half a century Mural. Visible, Michelangelo's mural:. ['Become the subject of fierce controversy about his artistic merit.', 'For centuries of neglect, to this day.', 'Dust-covered during recent summer work.', 'People prefer authentic murals, and although it is eroded by the years, they can feel more enjoyable from it.']