in Birmingham 2022. Athletes stayed at the student accommodations of the University of Alabama at Birmingham (UAB), several of whose sports facilities were used for various events. Past venues have included the Lahti City Theatre (bodybuilding), Landschaftspark Nord (a former iron foundry in Duisburg), Wrocław Zoo, and Wrocław's Philharmonic Hall, the National Forum of Music. Even though it is not required, some venues are constructed or renovated for The World Games. For instance, for the 2017 World Games in Wrocław, a new swimming pool and speed skating rink were built, and Olympic Stadium, built in 1928, was renovated and is still used for American football and speedway. Also, for the 2009 World Games, Kaohsiung built a National Stadium – the first stadium in the world to use solar energy technology for its power. Other editions used new facilities that were built for purposes other than the World Games; the main stadium of the 2022 edition, Protective Stadium, was built for UAB's American football team. Athlete selection Athletes are selected to compete at The World Games by their sport's international federation, as opposed to their sport's national governing body or National Olympic Committee, as in other multi-sport events. The selections are intended to "achieve a satisfactory balance between competitors' positions on world ranking lists and the fair representation of as many as possible of its member nations". International federations are obliged to send their best athletes, with The World Games development agenda setting out that sports are only to be included if "the best athletes/teams in the world are present". International World Games Association The International World Games Association (IWGA) is the international association responsible for the direction and control of The World Games. Its headquarters are located in Lausanne, Switzerland, and its official language is English. Its membership consists of 39 international sporting federations. It also works very closely with the Local Organising Committees (LOCs), temporary committees responsible for the organisation of each World Games. LOCs are dissolved after each Games. The IWGA is officially recognised by the International Olympic Committee. Ceremonies Opening ceremony The opening ceremony marks the official start of The World Games. Until Duisburg 2005, athletes paraded into the ceremony grouped by sport. From 2005, they were grouped by nation, and now march in alphabetical order, with the host country and then the judges last. The Athletes' Oath is taken by an athlete of the host nation,