the Monza racetrack

The decision to build a brand new racetrack was taken in January 1922 by the Milan Automobile Club, on the twenty-fifth anniversary of the association.

 The objective was to attract international buyers for cars made by Italian companies, have a stable place to run the Italian Grand Prix (which the year before had taken place on the semi-permanent circuit of Montichiari) and, above all, a circuit where to carry out experiments and tests.

the Monza racetrack is the third permanent circuit in the world after Indianapolis, in the United States, and Brooklands, in England.

https://www.pirelli.com/global/en-ww/race/monza-racetrack-the-temple-of-speed