Since 2013 the Mittelrhein-Museum has been located in the Forum Confluentes on Koblenz’s central square; it presents collections on the art and cultural history of the Middle Rhine Valley.
The municipal institution traces its origins to a donation from 1835 and is maintained by the city of Koblenz. Originating from the painting collection of an art‑minded pastor, the museum developed alongside major civic collections in other cities and is one of Germany’s oldest civic museums, sustained by civic engagement. Over its history the institution changed location several times and had to move a total of ten times; from 1965 to 2013 it was housed in the Alten Kaufhaus on Florinsmarkt.
Originally the Lang painting collection of more than 200 works formed the core holdings; it included sacred painting of the late Middle Ages, masters of the 17th‑century Dutch tradition and paintings from the 18th to the early 19th century. Over the years municipal collections and civic foundations supplemented the holdings. The war and post‑war periods brought radical changes: parts of the collections were moved into external storage, others were lost or stolen. After 1945, beginning in 1949 the remaining objects were exhibited under the name Mittelrheinisches Museum at Festung Ehrenbreitstein, before in 1965 the move into the restored buildings on Florinsmarkt.
The move to Forum Confluentes addressed pressing problems such as lack of accessibility, fire‑safety requirements and overcrowding. The new cultural building offers a total of 12,000 m² of usable floor space; the museum occupies about 3,200 m² across several levels. In the first year after the move visitor numbers increased significantly.
Today the collection comprises around 20,000 objects documenting more than 2,000 years of Rhenish art and cultural history: over 1,100 paintings, approximately 8,000 prints and drawings, more than 300 sculptures as well as numerous decorative‑arts objects, furniture, textiles, militaria, archaeological finds, architectural fragments, photographs, ceramics and coins. One focus is on Rhine Romanticism and regional views; larger bodies of work by contemporary artists are also represented in the holdings.