Shine On You Crazy Diamond" is a nine-part Pink Floyd composition written by David Gilmour, Roger Waters, and Richard Wright, which appeared on Pink Floyd's 1975 concept album Wish You Were Here. The song is written about and dedicated to founder member Syd Barrett, who departed from the band in 1968 after becoming mentally ill.

Background

The song was conceived and written as a tribute and remembrance to Pink Floyd founding member Syd Barrett.^[7] Barrett was eased out of the band in 1968 because his drug use and deteriorating mental health were affecting his ability to integrate with the other band members and create and perform as a musician. He was replaced by his former school friend David Gilmour, who had initially been brought in as second guitarist. The remaining members of the band felt guilty about having removed him, but although they admired Barrett's creativity, they were concerned about his severe mental decline and felt it had been necessary.^[8] "Shine on You Crazy Diamond" was first performed on Pink Floyd's 1974 French tour and was recorded for their 1975 concept album Wish You Were Here. The track was originally intended to be a side-long composition, like "Atom Heart Mother" and "Echoes", but was ultimately split into two parts and used to bookend the album, with other newly composed material acting as a bridge.^[9]