On April 12, 2008, the Oslo Opera house opened its doors to visitors. Contrary to the conventional results of undertakings of this nature, the Opera House was finished ahead of schedule and under budget.
The designers of the building, architects representing the local firm Snøhetta, drew inspiration for the Norwegian popular custom of hiking up their local mountains. So, they designed the Opera House, in a way that visitors would be able to walk up its roof and admire the panoramic view at it's rooftop.
The granite and marble building received the Mies van der Rohe award in 2009.