Procol Harum (formed 1967, London, England) is arguably the most successful 'accidental' group creation - that is, a band originally assembled to take advantage of the success of a record created in the studio - in the history of progressive rock. Procol Harum (formed 1967, London, England) is arguably the most successful 'accidental' group creation - that is. In the early years, Matthew Fisher's organ and Robin Trower's guitar combined for a unique sound. They differ from most of the progressive rock bands of the 70s in the relatively prominent blues component to their sound, which is largely due to the voice and piano of leader Gary Brooker.
Procol Harum's claim to fame is 'A Whiter Shade of Pale', a huge hit in 1967.
