In the mostly abandoned village of Aghurmi in the Siwa Oasis is a most famous temple of Amun, now more known as the Temple of the Oracle because of Alexander's visit when he conquered Egypt. It is actually one of two temples dedicated to Amun at Siwa, the other being Umm Ubayda. It sits atop a flat rock, and is a spectacular sight. Built during the 26th Dynasty (though the Oracle's origin is reputed to be much, much older), this temple and its Oracle flourished well into the Greek and Roman periods.
There are a number of myths about the founding of this temple. One of them tells of two black priestesses from the Temple of Amun at Thebes (modern Luxor) who were banished to the desert. In this tell, one of them founded the Temple of Dodona in Greece, where she became the voice of the Oracle. The second, after a time in Libya, came to Siwa where she became the Oracle's sibyl.