Gallery Moos was opened by Walter Moos in May 1959 at the corner of Avenue Road and Davenport Road in Toronto. Early in 1963 it moved to Yorkville Avenue, becoming one of the first arrivals in what was to become a significant gallery district of the city, and subsequently prospered there for some 30 years. In July 1992 the gallery moved to its current location at 622 Richmond Street West. Walter Moos was born in Karlsruhe, Germany in 1926. He was educated at the Ecole Supérieure de Commerce in Geneva (graduated 1946) and at the New School for Social Research, New York, from 1948 to 1951. Moos moved to Toronto from New York in 1959, having become acquainted with the city through visits with his brother, an engineer, who lived there. He married Martha Wegmuller in 1962, and had two sons, Michel André and David Alfred. The Moos family has a well-established history as gallery owners. Walter Moos is a founding member of the Art Dealers Association of Canada, and served as its president from 1971 to 1978. He was the chairman of its appraisal committee from 1972 to 1989. He served on the Canadian Eskimo Arts Council from 1972 to 1982 and is the founder and past trustee of the Gershon Iskowitz Foundation.