Fullösa Church was built in the 1100s. The sacristy and porch were added later in the Middle Ages and windows were enlarged in 1600-1700s. The most interesting sight in the church are mural paintings made in Baroque style in 1630s. The artist was Gullick Gullicksson, who also painted murals to near churches and Läckö castle. The altar dates from 1600s. There are two cuppas dating between 1100 and 1250. The Baroque pulpit dates was made in 1686.
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Frösöstenen is the northern-most raised runestone in the world and Jämtland's only runestone. It originally stood at the tip of ferry terminal on the sound between the island of Frösön and Östersund. The stone dates to between 1030 and 1050. It has now been relocated to the lawn in front of the local county seat due to the construction of a new bridge, between 1969 and 1971, on the original site.
Frösö runestone inscription means: Austmaðr, Guðfastr's son, had this stone raised and this bridge built and Christianized Jämtland. Ásbjörn built the bridge. Trjónn and Steinn carved these runes.