The Formula One Monaco Grand Prix has had a support open-wheel race in many of its editions.
The race was first held as a Formula Junior in 1950, won by Stirling Moss, but it was only brought back as a permanent event in 1959. Formula Junior was replaced by Formula Two and Formula Three in 1964 and the support race was now held with F3 cars. A European Formula Three Championship was introduced in 1974 but the Monaco race was not part of it and instead attracted drivers from the various national and international F3 series held in Europe.
After the end of the European Championship it was one of the two unofficial European F3 races along with the Masters of Formula 3. The F3 race was cancelled after 1997 and replaced by an International Formula 3000 race, held until 2004. The F3 race was resurrected once again in 2005 as a part of the Formula Three Euroseries, but this championship never returned as it had mostly followed the DTM calendar. The World Series by Renault has raced next to Formula One since 2005.
Note: A pink background denotes a Formula Junior race.