 Functionalist buildings in Helsinki by other architects include the Olympic Stadium, the Tennis Palace, the Rowing Stadium, the Swimming Stadium, the Velodrome, the Glass Palace, the Töölö Sports Hall, and Helsinki-Malmi Airport.The sports venues were built to serve the 1940 Helsinki Olympic Games; the games were initially cancelled due to the Second World War, but the venues fulfilled their purpose in the 1952 Olympic Games.Many of them are listed by DoCoMoMo as significant examples of modern architecture.