details and the ornaments are made from Jamtish limestone. Östersund City Hall was designed by Frans Bertil Wallberg (1862–1935) and was seen by contemporary colleagues as the best of modern Swedish architecture. The main part of the building is accentuated by a grand tower and a monumental stairway. It is accompanied by only one wing, the north wing, as the second, south wing, was torn down in the 1970s. A recently built landmark is Arctura, named after Jämtland's provincial star Arcturus, a large hot water accumulator tank. Due to its appearance it is referred to as ('the Thermos'). At night the 65-meter building is illuminated with various lights to give the appearance of sunrise and the Aurora Borealis, for example. History Lake Storsjön's shores have long been inhabited. The area where Östersund is situated was for a very long time Frösön's link to the east mainland. Frösön, the island of the Norse god Freyr, was originally the centre of the region and it was here the only inland Scandinavian hill fort, Mjälleborgen, was built around 300 AD. The ancient Scandinavian thing Jamtamót was held on this island, the christening of Jämtland begun here and it was here the world's northernmost raised runestone, Frösö Runestone, was raised. Plans regarding the foundation of a Swedish city or köping (market town, 'Chipping') in Jämtland existed among governmental officials already after the previously Norwegian province was ceded from Denmark-Norway in 1645. Queen Christina demanded the establishment of a sconce on Andersön shortly after the province became Swedish; this sconce would together with Frösö sconce secure Swedish control of Jämtland. Christina's intention was to locate the "Jamts' city" within this fortification. In order to construct the sconce the local inhabitants were coerced into forced labour 1651 but after protests and lack of capital the project was ended in 1654. In 1758, the plans were brought back up through an initiative from the chief financial director Pehr Schissler and the proposition did however initiate a new debate whether or not a city was to be established in Jämtland, in order to counteract the trading and faring traditions of Jämtland's farmers. Several other attempts at concentration had previously been taken, and deemed unsatisfactory. Östersund was founded and given its charter by Monarch Gustav III of Sweden on 23 October 1786, shortly after the outskirt of the Odensala farmers' lands were bought for the purpose. Several other places