Reichenau an der Kněžna is a place, that before the Treaty of Saint-Germain belonged to Austro-Hungary and was situated in the administrative region Reichenau a. d. Knieschna.
Reichenau an der Kněžna was formerly part of the German Empire. In the German Empire, the place was called Rychnov nad Kněžnou. The place is now called Rychnov nad Kněžnou and belongs to Czechoslovakia.