Monumentum Inscription by Propinquos of Carnuntum On this slab, Gaius Iulius Propinquos indicates that he made a wall of the Mithraeum at his own expense. The New Mithraeum4 Feb 2022 Slab with inscription of Gaius Iulius Propinquos indicating that he paid to build one or two walls of the Mithraeum III of Carnuntum. The full article is reserved for our members. Log in or create a free account to access the entire site.