North, along Lake Mjøsa, up the valley Gudbrandsdalen, over the mountain range Dovrefjell and down the Oppdal valley to end at Nidaros Cathedral in Trondheim. There is a Pilgrim's Office in Oslo which gives advice to pilgrims and a Pilgrim Centre in Trondheim, under the aegis of the cathedral, which awards certificates to successful pilgrims upon the completion of their journey. Other churches The Lutheran Church of Norway has 21 churches within the municipality of Trondheim. They are all a part of the Diocese of Nidaros, which is based in Trondheim at the Nidaros Cathedral. Many of the churches are several hundred years old, with a couple which were built almost 1,000 years ago. The Roman Catholic Sankt Olav domkirke is the cathedral episcopal see of the exempt Territorial Prelature of Trondheim. Being located across the street from the Nidaros Cathedral, the two of them form an unofficial religious quarter along with a synagogue, a Baptist church, a Salvation Army office, and the 8-auditorium cinema Prinsen kinosenter. Museums Sverresborg, also named Zion after King David's castle in Jerusalem, was a fortification built by Sverre Sigurdsson. It is now an open-air museum, consisting of more than 60 buildings. The castle was originally built in 1182–1183, but did not last for long as it was burned down in 1188. However, the Sverresaga indicates it had been restored by 1197. The Trondheim Science Center () is a scientific hands-on experience center. The NTNU University Museum (Norwegian: NTNU Vitenskapsmuseet) is part of the Norwegian University of Science and Technology. There are also a variety of small history, science and natural history museums, such as the Trondheim Maritime Museum, the Armoury, adjacent to the Archbishops's Palace, Kristiansten Fortress, the music and musical instrument museum Ringve National Museum, Ringve Botanical Garden, the Trondheim Tramway Museum, and the Jewish Museum, co-located with the city's synagogue, which is among the northernmost in the world. Rockheim (, The National Discovery Center for Pop and Rock) opened at the Pier in August 2010. It is located inside an old warehouse, but characterised by an easily recognisable roof in the shape of a box. "The box" is decorated by thousands of tiny lights that change in a variety of colours and patterns, and is a landmark in the cityscape – especially on dark winter evenings. Prison Vollan District Jail (Norwegian: Vollan kretsfengsel) was a jail during the nazi occupation of Norway