Amon, Ammon, or Amen, Egyptian deity. He was originally the chief god of Thebes; he and his wife Mut and their son Khensu were the divine Theban triad of deities. Amon grew increasingly important in Egypt, and eventually he (identified as Amon Ra; see Ra) became the supreme deity. He was identified with the Greek Zeus (the Roman Jupiter). Amon's most celebrated shrine was at Siwa in the Libyan desert; the oracle of Siwa later rivaled those of Delphi and Dodona. He is frequently represented as a ram or as a human with a ram's head.