Part of the Façade of the Spada Palace in Rome
"Besides the walls and ceilings of the interior, the façades were frequently decorated with sculptured figures, and the flat spaces between the windows and mouldings underwent ornamentation. This took place either by a manner of painting called sgraffito, in which the undercoating was black, with a thin surface-coating of white laid over it, and then the design or shading was engraved or scraped away down to the black grounding; or similar designs were executed in base-relief, as is shown"The Palazzo Spada is a palace in Rome that houses a grand art collection, the Galleria Spada. The collection was originally assembled by Cardinal Bernardino Spada in the 17th century and added to by his grand-nephew Cardinal Fabrizio Spada (1643-1717), and by Virginio Spada (1596-1662).
A. Rosengarten, W. Collett-Sandars A Handbook of Architectural Styles (New York, NY: Charles Scribner's Sons, 1895)
Courtesy the private collection of Roy Winkelman