Sanctuary of Isis and the Magna Mater, Mainz

The Sanctuary of Isis and the Magna Mater was a sanctuary in Mainz, dedicated to Isis and Magna Mater.The temple was founded during the 1st century and remained active until at least the 3rd century. Its remains were discovered in late 1999, during construction of a shopping arcade in the city centre. Substantial excavations have been made at the site since. The remains of the building, selected finds, and a multimedia framework presentation can be viewed in a small museum in the basement of the Römerpassage. Consecration inscriptions suggest that the Flavian imperial house may have been involved in the foundation of the sanctuary.

Source: Wikipedia