The purpose of the study is to analyse the demonstration sports (baseball, glima and Gotlandic sport) into the 1912 Stockholm Olympics. Who took the initiative for the demonstration sports? The IOC or the Swedish Organising Committee? How were the demonstration sports received by the public and the press, and what was their legacy? The study is based mainly on primary sources from the 1912 Stockholm Olympics’ archive. The 1912 Stockholm Olympics has been well explored, mainly by Swedes and internationals, and this gives a good picture of the 1912 Stockholm Olympics from different perspectives. On the other hand, research into the demonstration sports in the Olympic Games is clearly limited and there is thus a great need for further studies. This current study covers just a small part of this need. The results show that in 1912 there was no considered strategy on the part of either the IOC or the Swedish Organising Committee concerning the demonstration sports. The initiative for the demonstration sports came from individual representatives of each type of sport, and the Swedish organisers were positive towards three of those proposed: baseball, glima and Gotlandic sport. The Swedish organisers had control over which demonstration sports would be included in the programme. This meant that the choice of demonstration sports lay beyond the control of the 1912 IOC, but this would change in the 1900s. During the games they were given limited attention at most, both publicly and in the press. The demonstration sports were removed from the Olympic programme before the 1992 Olympic Games.