Definition
Mithraicism is essentially the same as Mithraism—a mystery religion centered around the god Mithras that was popular in the Roman Empire from the 1st to 4th centuries CE. It involved secret initiation ceremonies, communal meals, and a unique view of the cosmos. A key image was Mithras killing a bull, which had religious significance. This faith was exclusive to men and particularly common among soldiers in the Roman army. Think of it like an exclusive society with ancient roots. It's a synonym for Mithraism.