Italian Grand Prix
Following the terrible accident during the 1928 Italian Grand Prix, where Emilio Materassi and 27 spectators lost their lives, the Italian Grand Prix was cancelled in 1929 and 1930. Not wanting to abandon racing at the Monza track completely, the Monza Grand Prix was held as a substitute during these years. Even when the Italian Grand Prix returned to the racing calendar, the Monza Grand Prix was retained as a separate event.