Attributed to the Master of the Martyrdom of St. Sebastian, ‘Hercules and Achelous’, ca. mid-17th century, The Metropolitan Museum of Art

probably mid-17th century; probably Austrian
http://www.metmuseum.org/art/collection/search/207032

Image rights: The Metropolitan Museum of Art (The Jack and Belle Linsky Collection, 1982), licensed under CC0 1.0 Universal