gets its name from its largest sponsor, the beverage company Hartwall, also based in Helsinki. The idea of building the arena came from Harry Harkimo in 1994. It was built to be ready for the Ice Hockey World Championships in 1997 and was delivered by the constructor on April 11, 1997. The building is elliptical, 153 metres long and 123 metres wide. 37 meters underground there is a practice arena which is used by many hockey teams. Total capacity in ice hockey games is 13 464 (all seats). The arena is convertible for various events
