<Tr> <Th> Type </Th> <Td> Legendary sword </Td> </Tr> <Tr> <Th> Element of stories featuring </Th> <Td> King Arthur, Gawain </Td> </Tr> <P> Excalibur, or Caliburn, is the legendary sword of King Arthur, sometimes also attributed with magical powers or associated with the rightful sovereignty of Great Britain . Sometimes Excalibur and the Sword in the Stone (the proof of Arthur's lineage) are said to be the same weapon, but in most versions they are considered separate . Excalibur was associated with the Arthurian legend very early . In Welsh, it is called Caledfwlch; in Cornish, Calesvol; in Breton, Kaledvoulc'h; and in Latin, Caliburnus . </P> <P> The name Excalibur ultimately derives from the Welsh Caledfwlch (and Breton Kaledvoulc'h, Middle Cornish Calesvol) which is a compound of caled "hard" and bwlch "breach, cleft". Caledfwlch appears in several early Welsh works, including the poem Preiddeu Annwfn (though it is not directly named - but only alluded to - here) and the prose tale Culhwch and Olwen, a work associated with the Mabinogion and written perhaps around 1100 . The name was later used in Welsh adaptations of foreign material such as the Bruts (chronicles), which were based on Geoffrey of Monmouth . </P>

Where did the sword in the stone come from