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
1928 Winter Olympics Games, up from 16 in 1924. Nations making their first appearance at the Winter Olympic Games were Argentina (first participation of a delegation coming from a country belonging to the Southern Hemisphere), Estonia, Germany, Japan, Lithuania, Luxembourg, Mexico, the Netherlands, and Romania. <noinclude> 1928 Winter Olympics The 1928 Winter Olympics, officially known as the II Olympic Winter Games (; ; ; ), were a winter multi-sport event which was celebrated February 11–19, 1928 in St. Moritz, Switzerland. The 1928 Games were the first true "Winter Olympics" held on its own as they were not in conjunction with a "Summer Olympics".