Formed in 1969 by Robert Fripp.
A full bio would cover pages and there are many of them on the internet that would end up being more complete. The band has continued over many styles and many members (the alumni list is a veritable who's who in prog) but one fact is certain... the first great progressive rock period begins with the release of the King Crimson debut in 1969 called In the Court of The Crimson King and if you dont' know this ablum you should stop all prog research and start here!