The Kyffhäuser Monument, also known as Barbarossa Monument, is an Emperor William monument in the Kyffhäuser mountain range in the German state of Thuringia. It was erected from 1890 to 1896 atop the ruins of the medieval Kyffhausen Castle near Bad Frankenhausen.
Designed by architect Bruno Schmitz, it is the third-largest monument in Germany. Schmitz has also designed the two largest memorials, the Monument to the Battle of the Nations, that commemorates the 1813 Battle of Leipzig and the Emperor William Monument at the Porta Westfalica.