Arnim, Ferdinand von (1814-66). Medium: pen and ink and watercolour on paper. Date: 1855. Charlottenhof Palace, Potsdam, Germany, built on the site of an old farm house, to the design of Karl Friedrich Schinkel (1781-1841); it served as the summer residence of Crown Prince Frederick William (later King Frederick William IV of Prussia); Provenance: Private Collection. Photographic rights held by The Bridgeman Art Library.