The Porvoo Cathedral was originally made of wood. The first stone walls were built between 1410 and 1420 and in 1450 the church was expanded four meters towards east and six meters towards south.
The cathedral has been destroyed by fire numerous times; in 1508 by Danish and in 1571, 1590, and 1708 by Russian forces. On May 29, 2006, the outer roof collapsed after arson, however with the inner ceiling undamaged and the cathedral interiors intact. The Cathedral was reopened on 2 July 2008.
Porvoo Cathedral is situated in the middle of Porvoo well-preserved and beautiful old town, which is popular tourist attraction particurarly in summer season.
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.