The Eleusinian mysteries were a religious festival in ancient Greek that
was held in honor of Demeter, the goddess of grain and fertility. The
mysteries were kept a secret, and therefore very little is known about them.
If you are eager to find about more about the Elusinian mysteries follow this link.
Bibliography:
"Eleusinian Mysteries." Encyclopedia Mythica. 2013. Encyclopedia Mythica Online. 06 Oct. 2013 <http://www.pantheon.org/articles/e/eleusinian_mysteries.html>.