Speculum Romanae Magnificentiae: Naval Battle. Artist: Master of the Die (Italian, active Rome, ca. 1530-60); After(?) Giulio Romano (Italian, Rome 1499?-1546 Mantua). Dimensions: sheet: 9 5/8 x 15 11/16 in. (24.4 x 39.9 cm) mount: 12 1/2 x 16 3/4 in