A method of painting on the plastered surface of a wall or ceiling before the plaster has dried so that the colors become incorporated in it. The term refers to any painting done on freshly laid wet plaster and left to dry with the plaster; the painting is part of the wall. It was usually executed with mineral and earthly pigments upon a freshly laid ground of stucco. Lime was found in nearly all the colors of Pompeii, which is part of fresco.