King asleep in mountain
The king asleep in mountain (D 1960.2 in Stith Thompson's motif index system) is a prominent folklore trope found in many folktales and legends. Thompson termed it as the Kyffhäuser type. Some other designations are king in the mountain, king under the mountain, sleeping hero, or Bergentrückung ("mountain rapture").
Examples include the legends of King Arthur, Fionn mac Cumhaill, Charlemagne, Ogier the Dane, King David, Frederick Barbarossa at Kyffhäuser, Genghis Khan, Constantine XI Palaiologos, Kraljević Marko, Sebastian of Portugal and King Matjaž.
The motifs A 571 "Cultural hero asleep in mountain", and E 502, "The Sleeping Army" are similar and can occur in the same tale. A related motif is the "Seven Sleepers" (D 1960.1, also known as the "Rip Van Winkle" motif), whose type tale is the Seven Sleepers of Ephesus (AT tale type 766).