The legend of King Arthur is a tale from medieval Britain that tells the story of a noble king who united the land. He is often associated with the magical sword Excalibur, which he pulled from a stone, proving his right to the throne. Arthur ruled from the castle of Camelot and was known for his bravery and leadership. Central to the legend are the Knights of the Round Table, a group of noble warriors who supported Arthur in his quest for justice. The stories also feature important figures like Merlin, the wise wizard, and Guinevere, Arthur's queen. Together, they faced various challenges, including battles against enemies and quests for the Holy Grail.