TT Circuit Assen

The TT Circuit Assen, known as "The Cathedral of Speed," is a 4.555 km track in Assen, Netherlands, built in 1955. It hosts the Dutch TT and has been a staple of Grand Prix motorcycle racing since 1949, except for 2020. The circuit, with a capacity of 110,000, also features on the World SBK calendar. Major upgrades were made from 1999 to 2002, and further modifications occurred in 2005 and 2006.