The story behind the most famous royal sword often centers on Excalibur, the legendary blade of King Arthur. According to Arthurian legend, Arthur proved his rightful kingship by pulling the sword from a stone, a feat no one else could achieve. In other versions, Excalibur was gifted by the Lady of the Lake. The sword symbolizes divine authority, bravery, and the unbreakable bond between a king and his destiny.