Raoul Blanchard is really the father of the Geography of Montréal through his publishing of a scientific study on the subject in 1947. No geographer before him had ever written such a global monograph. This publication with its documentary, scientific and literary value is a precious heritage for all his successors. Geography has since then splintered into specific themes with conceptual, methodological and ideological preoccupations very different from those of Blanchard in his time. For the last 40 years, scholars have been deepening and completing his work, but have never replaced it.