Tour de la Bourse, Place Victoria (Axonometric View) Montreal, Quebec — completed 1964 A forty-seven-storey tower designed by Luigi Moretti with Pier Luigi Nervi as structural engineer — the first major work of European modernism on Canadian soil, and at its completion the tallest reinforced-concrete building in the world. The original scheme called for three identical towers arrayed in a triangle around the Square Victoria; financial constraints reduced it to one. The surviving tower distils the collaboration that defines it: four slightly tapered concrete corner piers carry the entire structural load, freeing the bronze-anodised curtain walls between them from any bearing function — a structural diagram Nervi had explored at the Palazzetto dello Sport in Rome and refined here for the high-rise. The axonometric isolates this corner-borne logic and the convex profile it produces, qualities flattened by orthographic elevation. Luigi Moretti, architect; Pier Luigi Nervi, structural engineer; with Greenspoon, Freedlander, Dunne, Plachta & Kryton.