At first a wanted to present a vulcono from nearby ...
(Interesting legends about it, btw:
A German poet says, "Charlemagne the great king lives still [406] with his heroes. It is in Desenberg that he rests from his conquests. The mountain dwarfs guard his dwelling. There, in the broad halls, the heroes repose, overpowered with sleep, bound by an unseen hand. Around them are their glittering arms, ready to be donned for the battle. They breathe softly; they dream of war and victory. And at a marble table in the middle of the hall Charlemagne sits: his head reclines upon his breast; his countenance beams with the fire of youth; his hair and beard fall in long white waves to the ground. Long time has he waited there with his comrades. Oftentimes the dawning of their new life seems at hand, and a hum of joy runs through the halls. Then all the warriors rise to their feet: they seize their lances and their swords; but suddenly their joy is quenched, and again their eyes are closed in slumber. Only the king remains awake for a while; and he cries out, until the sound is echoed through the mountains, 'Ye dwarfs who guard my dwelling, what year is this?' The dwarfs answer; and the shadows settle again upon his features. 'Sleep on, comrades,' he says, 'the hour has not yet come.' With a dull sound, each warrior falls prone upon the earth: they sleep, and await the hour when the spell shall be broken. The king, with his long white beard, and his flowing hair, and his countenance glowing with youth, sits again at the marble table."
More common here is, however, the story, that King Frederick Barbarossa is living in there.)