Haymarket Square was a Chicago-based psychedelic rock band in the late sixities. The band's name is a reference to the 1886 Haymarket Square Riot, in which eight policemen were killed and seven workers sentenced to death. Drummer John Kowalski and bass player Bob Homa formed Haymarket Square in Chicago in the late 60s. Both had previously toiled in Chicago high school garage band the Real Things the name a derivation and tribute to English beat band the Pretty Things.

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