What is the most famous Canadian building for modern architecture?

The most famous Canadian building for modern architecture is the Montreal Biosphere, located in Montreal, Quebec. Built for the 1967 Expo 67 World’s Fair, the Biosphere is an iconic geodesic dome designed by architect Buckminster Fuller. The building is constructed from a steel frame covered in transparent acrylic, and it remains one of the most striking examples of modern architecture in Canada. Today, the Biosphere houses the Environment Museum and showcases exhibits related to environmental sustainability. Its unique design and historical significance make it a prominent landmark in Montreal.