Trillium Dome The Sensible Choice Bumper Sticker Decal Mississauga ON StadiumRare and unusual Trillium Dome that was never built "The Sensible Choice" Bumper Sticker Decal Mississauga ON Stadium Development and population growth in the Greater Toronto Area during the 1950s and 1960s convinced many that the area required a large stadium to host sporting events and concerts. Starting in the late 1950s various proposals were put forward to build such a stadium somewhere in Metropolitan Toronto, including one jutting out into lake