A painter, draftsman, and educator, Fleurimond Constantineau was born in Saint-Leonard-de-Port-Maurice, Quebec (now a part of Montreal); other than for travel, he lived his whole life in Montreal and died there.

His mediums were oil, acrylic, watercolor, pastel, pencil, ink, felt pen, charcoal, colored chalk, crayon, and mixed mediums. His best-known subjects are street scenes of Montreal, landscapes, seascapes, and the Inuit (Eskimo) genre*. He visited northern Quebec and the Northwest Territories (Canada's Arctic) six times (1951, 1967, 1968, 1970, 1972, and 1973) over a period of twenty-three years.