 Complete the following phrase:  The Italian Grand Prix of Formula 1 is the fifth oldest surviving Grand Prix, having been held since 1921. It is also one of the two Grand Prix present in every championship since the first one in 1950. Every Formula 1 Grand Prix except for the 1980 has been held at Autodromo Nazionale Monza. Formula 1 was also held at Imola 19802006, 2020 and Mugello 