Unknown Roman, ‘Bronze plaque of Mithras slaying the bull’, mid-2nd–early 3rd century A.D., The Metropolitan Museum of Art

Mid-Imperial, Antonine or Severan
http://www.metmuseum.org/art/collection/search/256570

Image rights: The Metropolitan Museum of Art (Gift of Mr. and Mrs. Klaus G. Perls, 1997), licensed under CC0 1.0 Universal

About Unknown Roman