Lupercalus's Realm

Lupercalus's Realm is a dimension that exists in the ether, created by Lupercalus when his human incarnation, Maxentius of Ancient Rome, died and became an Ephemeral Demon. This dimension is capable of projecting holograms of Lupercalus's past, particularly the moment where he ordered Saint Catherine's execution.

History
In 2001, Phoebe Halliwell and her ex-boyfriend, Josh Skilling, were accidentally pulled into the realm when she and her sisters freed him from Lupercalus's possession and were pulled in as a result. Phoebe and Josh witnessed the horrific hologram before Piper and Paige called them back.