2004 Summer Olympics return of the games to the city where they began. Having previously hosted the Summer Olympic Games in 1896, Athens became one of only four cities to have hosted the Summer Games on two separate occasions (together with Paris, London and Los Angeles). A new medal obverse was introduced at these Games, replacing the design by Giuseppe Cassioli that had been used since the 1928 Games. This rectified the long lasting mistake of using a depiction of the Roman Colosseum rather than a Greek venue. The new design features the Panathenaic Stadium. The 2004 Summer Games were hailed as "unforgettable,
Bids for the 2020 Summer Olympics of the host city selection process was approved by the International Olympic Committee (IOC) executive board as follows: Six cities were put forward by their respective National Olympic Committees (NOCs) to apply to host the Games initially, but Rome withdrew its bid shortly before the applicant files were due. The bidding cities come from two continents, Europe and Asia (Istanbul is considered to be located on the border between Asia and Europe). In 2020 it will be twelve years since an Asian city hosted the Summer Olympics (Beijing 2008) and eight years since a European city hosted the Summer Olympics