After Giovanni Battista PIRANESI, edited by Jean-François DAUMONT (active 1745-1768). Reunion of four 18th-century optical views: - "Triumphal Bridge erected by a Roman Emperor, whose equestrian statue can be seen in the middle, its point of view is from below the arch of another bridge similar to the one in the distance". Enhanced etching (yellowing and tearing), located lower center, engraved words in plate "A Paris chez Daumont / Piranesi inv." lower in margin. Sight size: Height 24.3 cm - Width 35.2 cm - View of a superb Palace in Rome [...]". Enhanced etching (yellowing), located and engraved in the plate "Piranesi inv et sculp / A Paris chez Daumont rue St Marin" lower down in the margin. Sight size: Height 25.3 cm - Width 36.5 cm - Group of stairs leading to a rotunda used as a theater in Rome". Raised etching, located lower center, engraved "A Paris chez Daumont / Piranesi inv." lower margin (glass damaged). Sight size: Height : 22.5 cm - Width : 34.5 cm - Group of stairs leading to a rotunda used as a theater in Rome". Enhanced etching (pitting), later handwritten inscription in reserve at bottom. Sight size: Height 24.5 cm - Width 38 cm