Speculum Romanae Magnificentiae: Interior Reconstruction of the Colosseum. Artist: Anonymous. Dimensions: sheet: 15 11/16 x 22 1/4 in. (39.8 x 56.5 cm) mount: 20 x 26 1/16 in. (50.8 x 66.2 cm). Series/Portfolio: Speculum Romanae Magnificentiae. Date: