King Arthur was a mythical king of England who lived during medieval times in his castle, Camelot. His father was Uther Pendragon whose biography was first written by Geoffrey of Monmouth (c.1095-1155) in his 'Historia Regum Britanniae' (History of the Kings of Britain). 'Pendragon' means 'Chief-Dragon', which suggests Uther was the 'foremost leader' during his reign. According to the legends, Arthur's mother was Lady Igraine.

There is no proof that Uther and Arthur existed, however, they are mentioned in several poems and stories. In one of the most famous tales, Arthur pulls a sword out of a stone, making him King of the Britons. The sword was called Excalibur and symbolised divine kingship and power.

Later in life, King Arthur's son, Mordred, seized his kingdom, forcing Arthur to fight. The long battle resulted in Mordred's death, but Arthur was also mortally wounded. After his death, King Arthur's knights threw Excalibur into a lake so that it could return to where it came from. Despite this story, another legend claims he never died but will return when Britain needs him.

Other stories about King Arthur involve a magician called Merlin, the Knights of the Round Table, and the quest to find the Holy Grail, the cup that Jesus drank from at the Last Supper.

More Info: en.m.wikipedia.org