In Wilhelm Schadow’s self-portrait, painted in 1815-1816 and now at the Nationalgallerie Berlin, Thorvaldsen is represented as the central figure, and has put his hand on the painter’s shoulder. The sculptor, Rudolph Schadow, meanwhile, shakes hands with his brother, Wilhelm. This painting has long been regarded as emphasizing a link between sculpture and painting. (http://arkivet.thorvaldsensmuseum.dk/artikler/facing-the-artist-in-rome-portraits-of-bertel-thorvaldsen)