Ground Plan of a Cathedral for Berlin. Dated: 1827. Dimensions: sheet: 27.4 x 15.7 cm (10 13/16 x 6 3/16 in.) image: 26.1 x 14.4 cm (10 1/4 x 5 11/16 in.). Medium: graphite and watercolor on wove paper, laid down on presentation mount. Museum: Nation