European Grand Prix
The European Grand Prix was created as an honorific title by the AIACR, the FIA's predecessor in the organisation of motor racing events. The first race to receive the title was the Italian Grand Prix, in 1923; the French Grand Prix followed in 1924 and the Belgian Grand Prix in 1925. After a hiatus in 1929, the Belgian race received the title in 1930, becoming the last race to do so before World War II.
Argentine Grand Prix
The Buenos Aires Grand Prix was an event first started in 1930 as a sportscar event held at the Costanera circuit until 1940 and switched to the Retiro circuit for 1941. After a six-year break and by then Juan Peron in office, racing resumed in 1947 at Retiro with the start of the South American "Temporada" Grand Prix series, competing twice that year under the Formula Libre regulations. Italian Luigi Villoresi won all 1947 Temporada events. The race regularly attracted Brazilian and European drivers and also Argentine drivers competing in Europe, such as Juan Manuel Fangio and José Froilán González. For the 1948 Grand Prix season, the race was moved to the Palermo circuit where it would remain to host six of twelve "Peron Cup" races until the end of 1950. In 1951, the Costanera Norte circuit would host its last three Grand Prix events before completion of the Autodromo 17 de Octubre (October 17), a purpose-built circuit where the championship Formula One Argentine Grand Prix was held on different variants of the facility from 1953 to 1960, 1972 to 1981 and 1995 to 1998.