The church of Sastamala in Karkku (dedicated to St. Mary) was built in the end of 15th century. In the Middle Ages Karkku was the spiritual and administrative center for the northern Satakunta area. Unfortunately church was nearly abandoned for decades in the 19th and 20th centuries. During this time for example the floor was destroyed. The church was renovated in 1960-1977 and today it's used mainly for summer ceremonies.
There is a fine collection of historical artefacts in Sastamala church. Oldest items are probably a stone font from the 13th century and the part of gravestone with engraving "1304".
La Hougue Bie is a Neolithic ritual site which was in use around 3500 BC. Hougue is a Jèrriais/Norman language word meaning a \'mound\' and comes from the Old Norse word haugr. The site consists of 18.6m long passage chamber covered by a 12.2m high mound. The site was first excavated in 1925 by the Société Jersiaise. Fragments of twenty vase supports were found along with the scattered remains of at least eight individuals. Gravegoods, mostly pottery, were also present. At some time in the past, the site had evidently been entered and ransacked.
In Western Europe, it is one of the largest and best preserved passage graves and the most impressive and best preserved monument of Armorican Passage Grave group. Although they are termed \'passage graves\', they were ceremonial sites, whose function was more similar to churches or cathedrals, where burials were incidental.