The excellent Olympic museum is at the Håkons Hall ice-hockey venue. On the ground floor there is a well-presented display covering the ancient Olympic Games, as well as all of the Olympic Games of the modern era, with a focus on the exploits of Norwegian athletes and the Lillehammer games.
Upstairs, you can look down upon the ice-hockey arena, which is circled by corridors with displays and video presentations from the Lillehammer games.