The Mithraeum of Dura Europos was found during excavations in the city in 1934. It is considered to be one of the best-preserved and best-documented cult buildings of Mithraism.
The temple is located in the northwest of the city, near the city wall. It is a free-standing building made of adobe bricks. The execution of the masonry is described in the preliminary report as rather poor. There were three construction phases. At the beginning it was a cult room built into a residential building, which over the years has been expanded and further decorated. The temple is at the ground level, and resembles a basilica inside. These are rather atypical elements for mithraeum, as they were mostly designed underground and grotto-like.