I spent some time this evening writing a page on the Mithraeum discovered at Lugo (ancient “Lucus Augusti” in Spain) in 2003. Found a few images online, mostly of the dig, but also of a rather splendid granite altar, about 3 feet tall.
It was slightly frustrated to discover that the publication of the find is in the “Journal of Roman Archaeology”, which is not in JSTOR and kindly offers to sell you access at $1 per page for a PDF. It’s a bit depressing to see that sort of greediness still lingering — as if the taxpayer had not already funded every bit of content in the journal, and funded every single subscription ever bought.
A corrrespondent has encouraged me to go and see some of the Mithraea. When the weather improves, perhaps I will. It might be a nice focus for some little day-trips.