Olympic Stadium is a multi-purpose stadium in Canada, located at Olympic Park in the Hochelaga-Maisonneuve district of Montreal. Built in the mid-1970s as the main venue for the 1976 Summer Olympics, it is nicknamed "The Big O", a reference to both its name and to the doughnut-shape of the permanent component of the stadium's roof. It is also called "The Big Owe" to reference the astronomical cost of the stadium and the 1976 Olympics as a whole.