A Mithraeum I existing in the potter's quarter of the ancient city. We only know that the building had a rectangular groundplan and that it was destroyed in the time of the Marcoman wars (Nagy in BpTort II, 433). Four altars found side by side belong to this sanctuary of which no further details are known.
The Mithraeum of Symphorus and Marcus, in Óbuda, Budapest, has been restored to public view in 2004 and, while well presented, it has been heavily restored.