Svalbard ( , ), also known as Spitsbergen, or Spitzbergen, is a Norwegian archipelago in the Arctic Ocean. North of mainland Europe, it lies about midway between the northern coast of Norway and the North Pole. The islands of the group range from 74° to 81° north latitude, and from 10° to 35° east longitude. The largest island is Spitsbergen, followed in size by Nordaustlandet and . The largest settlement is Longyearbyen. Whalers who sailed far north in the 17th and 18th centuries used the islands as a base; subsequently the archipelago was abandoned. Coal mining started at the beginning of the 20th century, and several permanent communities were established. The Svalbard Treaty of 1920 recognizes Norwegian sovereignty, and the Norwegian Svalbard Act of 1925 made Svalbard a full part of the Kingdom of Norway. The Svalbard Treaty established Svalbard as a free economic zone and a demilitarized zone. The Norwegian Store Norske and the Russian remain the only mining companies in place. Research and tourism have become important supplementary industries, with the University Centre in Svalbard and the Svalbard Global Seed Vault playing critical roles in the local economy. Apart from Longyearbyen, other settlements include the Russian mining-community of Barentsburg, the Norwegian research-station of Ny-Ålesund, and the Swedish-Norwegian mining outpost of Sveagruva (which closed in 2020). Other settlements lie farther north, but are populated only by rotating groups of researchers. No roads connect the settlements; instead snowmobiles, aircraft and boats provide inter-settlement transport. Svalbard Airport serves as the main gateway. Approximately 60% of the archipelago is covered with glaciers, and the islands feature many mountains and fjords. The archipelago has an Arctic climate, although with significantly higher temperatures than other areas at the same latitude. The flora has adapted to take advantage of the long period of midnight sun to compensate for the polar night. Many seabirds use Svalbard as a breeding ground, and it is home to polar bears, reindeer, the Arctic fox, and certain marine mammals. Seven national parks and 23 nature-reserves cover two-thirds of the archipelago, protecting the largely untouched fragile environment. While part of the Kingdom of Norway since 1925, Svalbard is not part of geographical Norway; administratively, the archipelago is not part of any Norwegian county, but forms an unincorporated area. This means that it is administered directly by the Norwegian government through an appointed governor, and is a special jurisdiction subject to the