The oracular temple of Ammon-Ra at Siwa is near an oasis in northwestern Egypt, 80 miles from the modern Libyan border. Construction and artifacts at Siwa have been dated to the 26th dynasty of ancient Egypt although the site is believed to be much older. A persian army of 50,000 was sent to capture Siwa around 524 B.C. but the army was lost in the desert.
Following his conquest of Egypt, Alexander the Great came to believe in his own divinity as a result of his visit to the oracle at Siwa. During the Greek occupation of Egypt, Siwa was known as the oracle of Zeus-Ammon. The location of Siwa was lost to the world for over 1,000 years until it's rediscovery in 1,792 A.D.