The Round Tower, from 'Carceri d'invenzione' (Imaginary Prisons), Giovanni Battista Piranesi, circa 1749–50

Print. Date: circa 1749–50. Dimensions: Sheet: 24 13/16 x 19 1/2 in. (63 x 49.5 cm); ; Plate: 21 7/16 x 16 5/16 in. (54.5 x 41.5 cm). Medium: engraving, etching, pen. Collection: Metropolitan Museum of Art. The Round Tower, from 'Carceri d'invenzione' (Imaginary Prisons) MET MM10265