From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
When the Quorum debates whether or not to grant Baltar's cult religious freedom, delegate Reza Chronides points out that their practices are not too different from Mithraists (TRS: "Escape Velocity").
- Mithraism was a religion practiced in the Roman Empire in the 1st to 4th centuries CE. It was an initiatory order that practiced its rites in natural caves or buildings resembling caves. Having a lot of similarities to early Christianity in certain areas, Mithraism was wide-spread throughout the empire, before Christianity became the official state religion and paganism was declared illegal by Theodosius I.