Oslo is the capital and most populous city of Norway. It is also the largest city in the country, with a population of over 673, 000 people. Oslo is located at the head of the Oslofjord, and is the economic and governmental center of Norway. It is also a major cultural center, with many museums, galleries, and other attractions. Oslo is known for its vibrant nightlife, and is home to many of Norway's most famous landmarks, including the Royal Palace and the Opera House.