Ethias Arena is a multipurpose arena in Hasselt, Belgium used for music concerts, sports (tennis, indoor cycling, jumping, etc) and other large venues. The arena opened in 2004 and holds up to 21,600 people. An arena is a circular or oval shaped (or sometimes rectangular) public space (akin to a classical amphitheatre), designed to showcase theater, musical performances, or sporting events. ... Hasselt is a city in Belgium, capital of the province of Belgian Limburg. ... 2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar. ...