Claim: The 1956 Nations motorcycle Grand Prix was held at the 118,865 capacity Autodromo Nazionale di Monza that was built in 1922 and an Italy team won the sidecar class and a UK tram came in second
Evidence: It took place on 9 September 1956 at the Autodromo Nazionale Monza. The 1956 Nations motorcycle Grand Prix was the sixth and final round of the 1956 Grand Prix motorcycle racing season. Italy Albino Milani United_Kingdom Pip Harris 118,865 Built in 1922, it is the world's third purpose-built motor racing circuit after those of Brooklands and Indianapolis.