Sgraffito

Palazzo Massimo Istoriato: a fading palace facade in Rome by Polidoro da Caravaggio and Maturino da Firenze, 1523
Artist from Pedraza creates a sgraffito mural at the Casa de los Picos School of Art and Design, Segovia
Artist from Pedraza creates a sgraffito mural at the Casa de los Picos School of Art and Design, Segovia
Layers of 1910 Sgraffito in Pirgy (Chios)

Sgraffito (Italian: [zɡrafˈfiːto]; pl. sgraffiti) is an artistic or decorative technique of scratching through a coating on a hard surface to reveal parts of an underlying layer contrasted in colour. It is produced on walls by applying layers of plaster tinted in contrasting colours to a moistened surface, and on pottery by applying two successive layers of contrasting slip or glaze to an unfired ceramic body. The Italian past participle sgraffiato is also used for this technique, especially in reference to pottery.