The TT Circuit Assen is a motorsport race track built in 1955 and located in Assen, Netherlands. Host of the Dutch TT, it is popularly referred to as "The Cathedral of Speed" by motorcycle racing fans. The venue has the distinction of holding the most Grand Prix motorcycle races every year since the series was created in 1949. It has a capacity of 110,000 spectators, including 60,000 seats. Since 1992, the circuit has also been part of the World SBK calendar except for the 2020 season.

Assen is a city and municipality in the Northeastern Netherlands, and is the capital of the province of Drenthe. It received city rights in 1809. Assen is known for TT Circuit Assen, the motorcycle racing circuit, where on the last Sunday in June the Dutch TT is run; and also for the annual Assen Dance Festival.