 This was overcome by the architects Frode Rinnan and Olav Tveten by building the venue into the hill as an amphitheater, hence the name, along with a stage at the low end.Construction was budgeted to cost 2 million Norwegian krone (NOK), but construction cost NOK 4 million.The overruns were largely caused by difficult ground conditions and the hillside location, with a more conventional location estimated to have halved the construction costs.