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
Olympic Games about 10,500 competitors from 204 nations at the 2012 Summer Olympics. The scope and scale of the Winter Olympics is smaller. For example, Sochi hosted 2,873 athletes from 88 nations competing in 98 events during the 2014 Winter Olympics. During the Games most athletes and officials are housed in the Olympic Village. This village is intended to be a self-contained home for all the Olympic participants, and is furnished with cafeterias, health clinics, and locations for religious expression. The IOC allowed the formation of National Olympic Committees representing nations that did not meet the strict requirements for political sovereignty that