In the Middle Ages Trondheim, farther to the north, was Norway's religious center. The city's skyline is still dominated by the Nidaros Ca­thedral, which is considered the finest Gothic church in Scandinavia. Trondheim is the home of Norway's Institute of Technology and of the University of Trondheim. The country's fourth university is in Tromso, in the far north, long a starting point for Arctic exploration.