One of the largest and most important cities in Norway, Trondheim is a major economical center, with some of the largest technical and medical research facilities in Norway. It has been a major city since its first inception as a trading village back in 997 under the rule of the Viking King Olav Tryggvason, and was actually the capital of the country until 1217. As such, the city boasts a long line of Norwegian history going back over the years, adding to the charm of Trondheim with more than just architectural wonders, but also plenty of cultural and historical significance. The Trondheimsfjord, an inlet of the Norwegian Sea, was an important waterway in the Viking Age, as it is still today, and is the third longest in Norway. It stretches from Ørland in the west to Steinkjer in the north, passing the city of Trondheim on its way, and offering some natural beauty to explore there.