Horns of Ammon

A coin depicting Alexander the Great, conqueror of Egypt, with Horns of Amon on his head

The horns of Ammon were curling ram horns, used as a symbol of the Egyptian deity Ammon (also spelled Amun or Amon). Because of the visual similarity, they were also associated with the fossils shells of ancient snails and cephalopods, the latter now known as ammonite because of that historical connection.[1]