Frescos can be repaired by methods of detaching sections of the fresco. Its exterior walls are covered with fresco paintings. Michelangelo Buonarroti depicting it as such in his masterpiece fresco on the Sistine Chapel ceiling. It is commonly garnished with crema, crumbled "queso fresco", raw onion rings and avocado slices. The Roman wall decorations in fresco and delicate stucco were a revelation. The fourth chapel has a ceiling fresco by Giorgio Vasari. The Casino, a small habitable summerhouse with two loggie for "al fresco" dining. Dominating the transept is the baptistery fresco. The drawing was covered with fresh plaster for making the fresco. Harmony was achieved by using the same dominant colors in mosaic and fresco. It is perhaps Raphael's most famous fresco. The advantage of Buon fresco is its durability. Eyes appear in many instances to have been painted "buon fresco". The room is named for the fresco on the ceiling. Named for the fresco on the ceiling.