British rock group, formed in 1966: originally comprised Syd Barrett (1946–2006), Roger Waters (born 1944), Rick Wright (1945–2008), and Nick Mason (born 1945); Barrett was replaced by Dave Gilmour (born 1944) in 1968 and Waters left in 1986. Recordings include The Piper at the Gates of Dawn (1967), Dark Side of the Moon (1973), Wish You Were Here (1975), and The Wall (1979)
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