A place consulted for advice or prophecy. There were many oracles in the ancient Greek world, most notably at Delphi, Didyma on the coast of Asia Minor, Dodona in Epirus, and Olympia. The most famous non-Greek oracle was that of the Egyptian Ammon at Siwah oasis in the Sahara, identified by the Greeks with Zeus and consulted by Alexander the Great in 331 bc. Apollo was the god most favoured as a giver of oracles though many other deities presided over oracular shrines. Consultations usually concerned religious matters but were also used by leaders seeking support for political or military actions.