Trondheim historically Nidaros and Trondhjem is a city and municipality in Sør-Trøndelag county Norway. With a population of 173 486 it is the third most populous municipality and city in the country although the fourth largest metropolitan area. It is the administrative center 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.
