Summer Olympic Games the time. Numbers declined for the 1904 Games in St. Louis, Missouri, United States, due in part to the lengthy transatlantic boat trip required of the European competitors, and the integration with the Louisiana Purchase Exposition World's Fair, which again spread the event out over an extended period. In contrast with Paris 1900, the word "Olympic" was used for practically every contest, including those exclusively for school boys or for Irish-Americans. A series of smaller games were held in Athens in 1906. The IOC does not currently recognise these games as being official Olympic Games, although many historians do. The
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