Schwarzrheindorf is one of Bonn's oldest districts and the most important sight here is the Doppelkirche, which has been standing since the 12th century. The Earldom of Wied at this time possessed a castle complex built by the Carolingians, on which the Cologne Cathedral bishop and chancellor Konrad III allowed Arnold von Wied to build a chapel. After his death in 1156, his descendants changed the castle into a Benedictine cloister. At the same time, the chapel was extended to the west with a nun's choir, so that it soon really began to look like a church. After its deconsecration, it was used as a barn, but its decline was halted and masses were held there once more from 1832. Because it was not damaged during the Second World War, the original Romantic facade can still be marvelled at today.