Harmonium is a Canadian progressive rock band that emerged in the 1970s, known for their sophisticated blend of rock, jazz, and classical influences sung primarily in French. The group pioneered a uniquely Québécois sound that combined intricate instrumental arrangements with poetic lyricism, earning them a dedicated following across Canada and internationally. Though they disbanded in the late 1970s, Harmonium's innovative approach to progressive rock continues to influence musicians and remains a cornerstone of Canadian rock history.