The McIntyre Medical Sciences Building is part of the McGill University campus in Montreal, Quebec, Canada.

Its design, by Canadian architect Janet Leys Shaw Mactavish of the architecture firm Marshall and Merrett, is meant to reduce traffic and circulation between rooms.

[1] Its position on the sloping side of Mount Royal, and the requirement for there to be two entrances at different levels (ground and 6th floors), made it a difficult architectural design site.

Its modern circular shape and design, as well as its height amidst the older buildings of the McGill campus, contributed to Montreal's image at the time of the Expo 67 World's Fair.

[2] The McIntyre Building, as it is generally known, houses, among other services and departments, the Osler Library of the History of Medicine (named after one of McGill's most famous medical graduates and professors and an icon of modern medicine William Osler) the Departments of Pharmacology & Therapeutics, Biochemistry, Physiology, and Anesthesia.