Summer Olympic Games demand for tickets to all levels of each event, there was controversy when seats set aside for sponsors and National Delegations went unused in the early days. A system of reallocation was put in place so the empty seats were filled throughout the Games. Rio de Janeiro, Brazil hosted the 2016 Summer Olympics, becoming the third city in the Southern Hemisphere to host the Olympic Games after Melbourne, Australia, in 1956 and Sydney, Australia, in 2000, and the first South American city to host the Olympics. The preparation for these Games was overshadowed by controversies, including the instability of Brazil's
Winter Olympic Games to host the 2022 Winter Olympics, and the host of the 2026 Winter Olympics will be selected on June 23rd, 2019. , no city in the southern hemisphere has applied to host the cold-weather-dependent Winter Olympics, which are held in February at the height of the southern hemisphere summer. To date, twelve countries have participated in every Winter Olympic Games – Austria, Canada, Finland, France, Great Britain, Hungary, Italy, Norway, Poland, Sweden, Switzerland and the United States. Six of those countries have earned medals at every Winter Olympic Games – Austria, Canada, Finland, Norway, Sweden and the United States. The