--DREAM TEMPLES --
The ancient Greeks sought dream oracles within sacred dream temples.
One of the renowned dream temples was the Temple of Amphiaraus at Oropos.
People would go to the temple and "purify oneself" first by making an offering to the Gods.
A ram was the sacrificed, its fleece removed and then used as a sleeping mat inside the temple.
Another famous temple was the Temple of Pasiphae.
The magistates of the city used the temple to recieve answers to difficult questions.
Sleeping within religious temples continued down through history.
Another famous dream shrine was located in Lough Derg in Donegal, Ireland.
It was a cave known as St. Patricks Purgatory. People would entomb themselves in tiny cells for up to nine days waiting for a vision of what was waiting for them in hell.