Which racetrack has hosted the most Formula 1 Grands Prix?

Formula One, abbreviated to F1, is the highest class of open-wheeled auto racing defined by the Fédération Internationale de l'Automobile (FIA), motorsport's world governing body. The "formula" in the name refers to a set of rules to which all participants and vehicles must conform. 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. The results of each race are combined to determine two annual Championships, one for drivers and one for constructors.

The first World Championship Grand Prix was held in 1950 at Silverstone; since then 71 circuits have hosted a Grand Prix. The Autodromo Nazionale Monza has hosted the most Grands Prix. It has been used as the circuit for the Italian Grand Prix 66 times. The only season it did not host a race was in 1980, when the Italian Grand Prix was held at the Autodromo Enzo e Dino Ferrari. The Baku City Circuit became the 71st circuit to host a Grand Prix, when it held the European Grand Prix in 2016.