The building is located to the north of the Episcopal Basilica on a much lower level than the church. It was entered by the steps from the street of Via Principalis Superior. A passage with colonnades on both sides leads from the stairs to many rooms. In the middle of the passage, the colonnade on the south side forms a semicircular area. The most significant room of the building is the apsidal hall at the eastern end. Its floor was made of sandstone slabs.

The Episcopal Residence was excavated in 1934, 1940 and 2001. A golden ring with a cross made of almandine and a bronze sanctuary lamp are the most popular finds. Remains of stucco decoration from the walls were discovered as well. The building was erected at the end of the 4^th century AD. The position close to the Basilica and the finds with Christian symbols are the arguments for its name. Later, during the 6^th century, the walls of the Episcopal Residence were used in the construction of modest houses.