The imposing Swabian castle of Rocca Imperiale is on the top of the hill over which the whole residential area extends. The fortress was ordered by Frederic II of Swabia in 1221, and he ordered the construction or refurbishment of 200 castles for defensive purposes in southern Italy. The castle was built in a place of great military and strategic importance and surveillance extended to the whole of the Gulf of Taranto. The development of the residential area followed the construction of the castle, bringing in the people from a series of fortified settlements in the area. Many feudatory lords alternated in the government of the area, constantly under barbarian attack, in the following 200 years.
In 1664, the castle withstood the attack of 4000 Saracen pirates who devastated Rocca, destroying the old 13th century church in the old centre of which only the lovely Romanesque bell tower with mullioned windows and cornices remains. In 1989, the last heirs of the family owning the castle decided to donate it to the Municipality of Rocca Imperiale.References:
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.