Unter-Rothwein is a place, that before the Treaty of Saint-Germain belonged to Austro-Hungary and was situated in the administrative region Marburg/Maribor.
Unter-Rothwein was formerly part of the German Empire. In the German Empire, the place was called Unterrotwein (Marburg-Unterrotwein). The place is now called Radvanje (Maribor-Radvanje) and belongs to Slovenia.