Fresco is a technique of mural painting executed upon freshly laid lime plaster. Water is used as the vehicle for the pigment and, with the setting of the plaster, the painting becomes an integral part of the wall. The word fresco is derived from the Italian adjective fresco meaning "fresh". Fresco may thus be contrasted with secco mural painting techniques, on plasters of lime, earth, or gypsum, or applied to supplement painting in fresco. The fresco technique has been employed since antiquity and is closely associated with Italian Rennaisance painting.