This building was found fortuitously in the early 1960s, and is located on the southern slope of Mount San Albín. Its proximity to the location of Mérida’s Mithraeum led to its current name. The whole house was built in blocks of unworked stone with reinforced corners. It demonstrates the peristyle house with interior garden and a room of the famous western sector Cosmogonic Mosaic, an allegorical representation of the elements of nature (rivers, winds, etc.) overseen by the figure of Aion. The complex has been recently roofed and renovated.
As mentioned above, it is not considered the actual mithraeum but a domus. The remains of the mithraeum are uphill from it in a plot corresponding to a current bullring. This site has rendered prime examples of the remnants of Mithraism. According to professor Jaime Alvar Ezquerra of the Charles III University of Madrid, the oldest mithraeum artifacts are observed outside of Rome and Mérida “is at the head of the provincial places where the cult is encountered”. These are currently located in the National Museum of Roman Art in Mérida, including the latest remains found in excavations as recently as 2003. He notes that some of the sculptures being discovered at the site are in very good condition, leading him to believe they were “hidden on purpose”.