Trondheim (Norwegian pronunciation: [ˈtrɔnhæɪm]), historically Kaupangen, Nidaros and Trondhjem, is a city and municipality in Sør-Trøndelag county, Norway. With a population of 181,513 (1 October 2013), it is considered to be the third most populous municipality in Norway, although the fourth largest urban area. It is also the third largest city in the country, with a population (2013) of 169,972 inhabitants within the city borders. The city functions as the administrative centre of Sør-Trøndelag county. Trondheim lies on the south shore of the Trondheimsfjord at the mouth of the river Nidelva. The city is dominated by the Norwegian University of Science and Technology (NTNU), SINTEF, St. Olavs University Hospital and other technology-oriented institutions.

The settlement was founded in 997 as a trading post, and it served as the capital of Norway during the Viking Age until 1217. From 1152 to 1537, the city was the see of the Catholic Archdiocese of Nidaros; since then, it has remained the seat of the Lutheran Diocese of Nidaros and the Nidaros Cathedral. It was incorporated in 1838. The current municipality dates from 1964, when Trondheim merged with Byneset, Leinstrand, Strinda and Tiller.

Trondheim may refer to:

Trondheim 2018 was a proposed bid for Trondheim, Norway, to host the 2018 Winter Olympics. Along with Oslo and Tromsø bid, it was one of three options for the Norwegian Olympic Committee, who ultimately chose to not bid for the games.

Plans

Most of the events would take place in Trondheim and its suburbs. Nordic skiing and biathlon would have taken place at Granåsen, which previously has hosted the FIS Nordic World Ski Championships 1997. Five competition ice rinks would be built: two at Leangen, for short-track speed skating and figure skating and ice hockey, Tiller for ice hockey, Stjørdal for curling, and Brattøra for speed skating. The latter would be built nearly a sea level, and would have spectators on one end and a glass wall on the other, giving a view of the Trondheimsfjord. Freestyle and snowboarding would be located at Vassfjellet. Alpine skiing and sliding sports would be located at Oppdal. With the exception of Brattøra, all venues would have been build in connection with existing venues.