The city of Trondheim is more than one thousand years old. Trondheim was founded in the year 997 by the Viking king Olav Tryggvason. Archaeological excavations in the area have, however, proved there to have been settlements along the River Nidelven also before 997. Trondheim was the capital of Norway from 1030 to 1217. The city celebrated its millennium in 1997. Norway's capital of technology is a lively and historical university town, and home to the famous Nidarosdomen Cathedral.