The church can be visited
Kapuziner Abbey

The Capuchin Monastery of Koblenz in Ehrenbreitstein was inhabited by Capuchin monks from 1627 to 2008. It is known for its Baroque Church of St. Francis, which is considered the only preserved Baroque church building in Koblenz.
History+
The Capuchins settled in Ehrenbreitstein in 1627 at the request of the Trier Elector Philipp Christoph von Sötern. The foundation stone for the monastery was laid in 1628, and construction was completed in 1629. During the Thirty Years' War, the complex was devastated in 1636 during battles for Ehrenbreitstein Fortress. Reconstruction took place in 1655 under Elector Karl Kaspar von der Leyen. After its conquest by French troops and secularization in 1803, the monastery was evacuated in 1813. Prussia took over in 1815 and used the complex as a train depot and barracks, with a large part of the buildings demolished in 1860.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://de.wikipedia.org/wiki/Datei:Kapuzinerkloster_09_Koblenz_2013.jpg
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 50.3587, 7.6110