^Karl der Große (Charlemagne). Rumour has it that he waits inside Untersberg Mountain.
Others say it's Friedrich Barbarossa. Again others say it's not Untersberg but Kyffhäuser Mountain.
There's rather a lot of versions. A few are mentioned in both the German and English Wikipedia:
http://de.wikipedia.org/wiki/Untersberg#Mythen
http://en.wikipedia.org/wiki/Untersberg#Legend
Others say it's Friedrich Barbarossa. Again others say it's not Untersberg but Kyffhäuser Mountain.
There's rather a lot of versions. A few are mentioned in both the German and English Wikipedia:
http://de.wikipedia.org/wiki/Untersberg#Mythen
http://en.wikipedia.org/wiki/Untersberg#Legend