Holger Danske, Guardian of Western Civ?

Holger Danske looks to me like a mighty hero of yore,

but is he, indeed, the Guardian of Western Civilization?

http://gatesofvienna.blogspot.com/2007/03/holger-guardian-of-west.html

Holger waits in the catacombs under Hamlet's castle:

http://www.copenhagenpictures.dk/kronborg.html