Lancelot is welcomed into the court of King Arthur as a valiant fighter and later rescues Queen Guinevere, fights the tournament at Astolat, and pursues other adventures.
The young King Arthur asks for and receives the noble sword Excalibur from the Lady of the Lake and promises to be deserving of it through acts of valor.
By being the only person able to draw a sword from an anvil on a block of marble, a young boy proves himself to be the successor to the throne of all Britain.
