Reunion of three 18th century engravings: - After Jean-Michel MOREAU dit le Jeune (1741-1814), engraved by Charles-Etienne GAUCHER (1740-1804). "Coronation of Voltaire". Engraving, titled in a cartouche lower center. Sight size : Height. : 19 cm - Width : 25 cm - 18th century French school. "Fireworks at Versailles on May 19, 1770". Etching (spotting). Height 19.5 cm - Width 29 cm French school of the 18th century. Calliope. Engraving (wet), titled in the lower margin. Sight size: Height : 34.5 cm - Width : 22.8 cm