King Arthur's legendary Round Table has been located in Scotland, and it is not a table at all but a 2,000-year-old rotunda built of stone, Britain's authority on aristocracy said Monday. Arthur, a fourth century Celtic king who fought Saxons invading Britain, organized 1,600 feuding barons around what was thought to be a table at his fort, Camelot, in Cornwall of southwest England or Wales. Researchers have located stones apparently from a large round building known as a rotunda in Stenhouse, 415 miles north of London and 65 miles northeast of Ayrshire, which they believe is Arthur's Round Table.