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After just a few months of existence, King Crimson made a major breakthrough when The Rolling Stones invited them to perform at their iconic free concert on July 5th, 1969, at Hyde Park, London.

The iconic concert was guitarist Mick Taylor's first public performance with the Stones following Brian Jones' dismissal and subsequent death.

The occasion exposed Crimson to a congregation of half a million people. Keen to strike while the iron was hot, they entered the studio to record their debut album, In the Court of the Crimson King.