Hôpital Maisonneuve-Rosemont was founded in 1971 as a result of a merger of two previous hospitals: Hôpital Maisonneuve and Hôpital Saint-Joseph de Rosemont.[1]
Hôpital Maisonneuve was founded by the Grey Nuns in 1954 and housed a nursing school and the Montreal Heart Institute. Hôpital Saint-Joseph de Rosemont was built in 1948 and was founded in 1950 by the Misericordia Sisters. It specialized in treating tuberculosis.