What were some of the stories that surrounded the fantasy of King Arthur? (Site 1)

The sword in the stone, the knights of the round table, Lancelot, the magician Merlin, the holy grail, Excalibur, Mordred, camelot,

Explanation:

King Arthur was a famous British leader that was known to have led the defense of his home country, Britain, against a group of people from Germany known as Saxons that invaded between 5th and 6th centuries.

There has been long debates over the true existence of King Arthur and historians have not been able to confirm that.