Oslo is the capital and most populous city of Norway, with a population of about 1.7 million (metro).
Oslo was founded toward the end of the Viking Age as Ánslo in 1040 AD.
Oslo is the economical and commercial center of Norway. It is also a major hub for Norwegian trade, banking, shipping and industry.
Oslo is home to Norway's Monarch King Herald V of Norway. The King resides in the Royal Palace when he is home. When the King is home, the flag is up over the Palace: https://www.kongehuset.no/seksjon.html?tid=27160&sek=26983
American country music is very popular in Norway, but is typically referred to as Americana music. While I was there, I attended a George Jones tribute concert from a local band at Herr Nilsen jazz club (https://www.herrnilsen.no/). I met a couple of Norwegians who had attended the Grand Ole Opry in Nashville 5 and 6 times. I was amazed at this and the concert was great. I became Facebook friends with the lead singer of the band, Toini & Rio Bravo. https://www.facebook.com/RioBravotheband
Top tourist attractions in Oslo include Akershus Fortress, Fram Museum, Holmenkollen Ski Museum & Tower, MUNCH, National Museum, etc.: https://www.visitoslo.com/.../10.../top-attractions/
I enjoyed Oslo, though it is a very expensive place. I managed to find an AirBnb accommodation for only $33/night that was just a 40-minute train ride outside of the city. Norwegians a fun people to be around and easy to get along with. The food, nightlife, museums, culture, Viking heritage and everything else is definitely worth experiencing: https://www.visitnorway.com/things.../art-culture/vikings/
The best places to see the northern lights in Norway are, well, in the north: https://www.nordicvisitor.com/.../best-time-place-see.../