When a host city is given the honor of being a host to an Olympic games they are given a specific flag to fly at their city hall along with the IOC flag to show that they are the host of the current games. At the closing ceremonies of each Winter Olympics the host city that had just hosted the games will pass the Oslo Flag to the next host city and the IOC flag and the Oslo Flag will fly for the next four years at the next host city. When the Summer Olympics come to a close the Seoul Flag is passed on to the next host city to fly at their city hall for the next four years. But where did these specific flags for each Olympic games come from and who decides to make a flag for the games?
In 1920 the host city of Antwerp, Belgium presented the IOC with a special flag they wanted to use to commemorate the Summer Olympic games and that flag became known as the Antwerp Flag. The Antwerp Flag was passed from Summer Olympic city to Summer Olympic City until it was retired to the Olympic Museum in Lausanne, Switzerland after the 1988 games. In 1988 the city of Seoul, South Korea presented a new Summer Olympics flag and soon the Seoul Flag was accepted as the new Summer Olympic flag. It is not the Seoul Flag that gets passed from host city to host city for the Summer Olympics. For the Winter Olympics The Oslo Flag is used and it was presented to the International Olympic Committee by the city of Oslo, Norway after the 1952 Winter Olympic games. Today the Oslo Flag continues to be passed to the next Winter Olympic host city by the previous host city just as the Seoul Flag is for the Summer Olympics. It may be time for a new winter Olympic flag but until some host city presents a new one to the IOC it will continue to be the Seoul Flag that marks the Summer Olympics host and the Oslo Flag that marks the Winter Olympics host and both flags fly side by side with the ICO flag at the host city's City Hall.