Report London 2012 Olympic Cauldron... in London 2012 Ceremonies Discussions Posted July 26, 2012 You are right. And Montreal 1976 before that. I even think Seoul 1988 and Montreal 1976 are the only summer games with a cauldron only visible inside the Olympic stadium? And London 1948. Helsinki 1952 kinda - depends on what you consider their cauldron...the bowl on the floor or the vent on the tower.