Hercules Killing the Hydra of Lerna. Artist: Battista Franco (Italian, Venice ca. 1510-1561 Venice). Dimensions: sheet: 12 1/2 x 8 7/8 in. (31.8 x 22.6 cm) plate: 12 3/16 x 8 1/4 in. (31 x 21 cm). Date: After 1552. Museum: Metropolitan Museum of Art,