Formula One, abbreviated to F1, is currently the highest class of open-wheeled auto racing defined by the Fédération Internationale de l'Automobile (FIA), motorsport's world governing body.
[2] The Formula One World Championship season consists of a series of races, known as Grands Prix, usually held on purpose-built circuits, and in a few cases on closed city streets.
A lot of classic (older) circuits have hosted Grands Prix using different configurations throughout their history: Nürburgring, Spa-Francorchamps, Monza, etc.
Taking Nürburgring as an example, the first World Championship race there used the 22.835 km (14.189 mi) configuration, but concerns over safety meant that more recent Grands Prix have used a shorter, safer circuit.
The longest circuit to have hosted a Grand Prix is the Pescara Circuit, which hosted the 1957 Pescara Grand Prix: the 25.800 km (16.031 mi) long circuit in Pescara, Italy, held the annual Coppa Acerbo race, and in 1957 it was the only time that this race was included as part of the World Championship, a race which Stirling Moss won.