with the four-hour format. 1998 - Did not qualify for an international championship. It returned to the 1,000-kilometre distance, and was re-opened to sports cars. 1999 - The distance was reduced to 500 km, and it again became eligible for the international SportsRacing World Cup championship. 2000 - Although the race was run at 500 km, it was called "1,000 km" because another 500-km race (for the FIA GT Championship) was held that morning. 2001 - Returning to the 1,000-kilometre distance, the race was eligible for the FIA Sportscar Championship. 2003 - After a year off, the race returned to the 500-kilometre distance. 2004 - the race was resumed as part of the Le Mans Series. 2006 - The race, part of the Le Mans Series, was cancelled due to protests about noise pollution. 2007 - Agreements were reached to allow the event to return to the Le Mans Series. The race was not held from 2009 to 2020, after which a six-hour race was scheduled as part of the 2021 FIA World Endurance Championship. Winners Notes References External links Racing Sports Cars: Monza archive 1949 establishments in Italy Recurring sporting events established in 1949 Auto races in Italy Sports car races