Where in the world was king aurthur bueird and who was he?

Answer 1

King Arthur was a mythical King of All Britain whose story became enormously popular all over Western Europe from about the eleventh century until about the seventeenth. There is scant historical evidence for a historical Arthur (though there is some) - and none at all to suggest he was any more than a regional leader.

There is a Welsh proverb that says:

Annoeth bedd Arthur

[We don't speculate about Arthur's grave]

A grave for Arthur was 'discovered' at Glastonbury Abbey during the 1100's - but that was to be expected: the monks of Glastonbury were working hard to identify themselves with the Arthur story as a means of making money for their abbey.

Annoeth bedd Arthur is the sensible answer to your main question.