The TT Circuit Assen is a motorsport race track built in 1955 and located in Assen, Netherlands. Host of the Dutch TT race, it is considered "The Cathedral" of motorcycling by the fans. It has a capacity of 100,000 spectators, including 60,000 seats. It has also become a venue for concerts as heavy metal legends Iron Maiden performed at the circuit in August 2008, making them the first band to hold a concert at the venue.