The Basilica of Sts. Peter and Paul also called Reichenau Basilica It is a Catholic church of Romanesque style located in the island of Reichenau in Niederzell in the municipality of Reichenau to the south of Germany.The first church dedicated to St. Peter in this place was built in 799 by the Egino bishop of Verona, who had retired to a monastery here in the territory of the abbey of Reichenau, after having ruled the diocese of Verona, where he died in The 802.
The church consists of a room of worship with a single apse, which had to be very richly adorned, as evidenced by the ornamental reliefs that remained in the present northern aisle of the temples. The remains of the mural paintings of the Carolingian period show that the walls of the church originally had a great artistic wealth.
Wikipedia https://en.wikipedia.org/wiki/Basilica_of_Sts._Peter_and_Paul,_Reichenau
Coordinates 47°42'24.691" N 9°2'38.905" E