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
Colonialism and the Olympic Games World's Fair), and were the first modern Olympic Games to be held in North America. Since the 1889 Paris Exposition, human zoos, as a key feature of world's fairs, functioned as demonstrations of anthropological notions of race, progress, and civilization. These goals were followed also at the 1904 World's Fair. Fourteen hundred indigenous people from Southeast Asia, the Pacific Islands, East Asia, Africa, the Middle East, South America and North America were displayed in anthropological exhibits that purportedly showed them in their natural habitats. Another 1600 indigenous people displayed their culture in other areas of the Louisiana Purchase Exposition (LPE),