Schloss Allner

Schloss Allner
Near Hennef in Germany
Schloss Allner seen from above in 2010.
Coordinates	50°46′51.3″N 7°18′06.1″E / 50.780917°N 7.301694°E / 50.780917; 7.301694
Site information
Owner	Franz Schilke
Open to the public	No
Condition	Restored
Site history
Built	Early 15th century
Built by	Merkelsbach family
Demolished	1945 (partial demolition)
Events	Assault by US troops on April 7–8, 1945

Schloss Allner is a fifteenth-century castle in Rhein-Sieg-Kreis, North Rhine-Westphalia, Germany. It is located on the southern slope of the Nutscheid Ridge, on the north bank of the River Sieg, and just northeast of the Allner See. It lies to the northeast of the town of Hennef, east of the district of Allner.

During its history it has served as a residence, a municipal seat and an orphanage. During World War II it was the scene of an unsuccessful attempt by the Wehrmacht to halt the advancing Allied forces from crossing the Sieg and entering the Ruhr Valley.