Oslo Opera House The Norwegian National Opera and Ballet, and the national opera theatre in Norway operate through the Oslo Opera House. All their musical dramas, ballets and operas are played out here. The structure stands right in the centre of Oslo in Bjørvika. The total area of the Opera House is 38,500 m² with includes 1,100 rooms. The main auditorium can accommodate up to 1364 people at a time.turkeyarena.com King Harald V of Norway inaugurated it in April 12, 2008, which was attended by all national leaders, and other Royal people like Chancellor Angela Merkel of Germany and Queen Margrethe II of Denmark. Address: Kirsten Flagstads plass 1, 0106, Oslo Tel: +47 21 42 22 26, +47 81 544 488 Opening Times: Weekdays 10 a.m. - 6 p.m. or until the start of the performance, Saturdays 10 a.m. - 2 p.m. or until the start of the performance.