The Triumphal Arch, from Grotteschi (Grotesques). Artist: Giovanni Battista Piranesi (Italian, Mogliano Veneto 1720-1778 Rome). Dimensions: Sheet: 19 1/2 x 25 7/16 in. (49.5 x 64.6 cm) Plate: 15 3/8 x 21 5/16 in. (39 x 54.2 cm). Publisher: Giovanni B