The literal translation of the Arabic phrase ""Dhul-Qarnayn,"" as written in the Quran, is "the Two-Horned man." Alexander the Great was portrayed in his own time with horns following the iconography of the Egyptian god Ammon-Ra, his supposed divine father. Rams were a symbol of virility due to their rutting behaviour; the horns of Ammon may have also represented the East and West of the Earth, and one of the titles of Ammon was "the two-horned." Alexander was depicted with the horns of Ammon as a result of his conquest of ancient Egypt in 332 BC, where the priesthood received him as the son of the god Ammon, who was identified by the ancient Greeks with Zeus, the King of the Gods. The combined deity Zeus-Ammon was a distinct figure in ancient Greek mythology. According to five historians of antiquity (Arrian, Curtius, Diodorus, Justin, and Plutarch), Alexander visited the Oracle of Ammon at Siwa in the Libyan desert and rumours spread that the Oracle had revealed Alexander's father to be the deity Ammon, rather than Philip. Alexander styled himself as the son of Zeus-Ammon and even demanded to be worshiped as a god: