Montréal Olympic Stadium

City: Montreal, Canada

Year of Games: 1976

Architect: Roger Taillibert

Montreal's Olympic Stadium has earned the nickname "The Big O" due to the doughnut shape of the permanent component to its roof. Roger Taillibert designed the roof to be retractable, which would be opened and closed by a 574 ft tower, the tallest inclined tower in the world. Despite hiccups in construction—functional elements were not complete for the Olympic's themselves—we champion this iconic structure for shear ambition (and for being a masterpiece of Organic Modern architecture.