Hattula Church is one of the oldest brick buildings in Finland. It was built in the 15th century and dedicated to the Holy Cross. Wall paintings are from the 16th century. The porch in front of the hall was built in the 16th century of grey stone and bell tower in 1813.
Unique for having been built almost entirely of brick rather than stone, the church was a popular pilgrimage destination during the Middle Ages. A grey stone perimeter wall was added in the 16th century. The church contains paintings from the years 1510 through 1922, as well as 40 wooden sculptures dating to the first half of the 14th century. Precious-metal crowns which had formerly belonged to the church were confiscated during the Reformation. The church pulpit, dating to 1550, is the oldest surviving pulpit in Finland. A second pulpit was built in the 17th century.
The Hattula church is known for its lime paint frescoes done in late Gothic style, likely completed by the same group of artists who later painted the St. Lars church in Lohja.
The Externsteine (Extern stones) is a distinctive sandstone rock formation located in the Teutoburg Forest, near the town of Horn-Bad Meinberg. The formation is a tor consisting of several tall, narrow columns of rock which rise abruptly from the surrounding wooded hills. Archaeological excavations have yielded some Upper Paleolithic stone tools dating to about 10,700 BC from 9,600 BC.
In a popular tradition going back to an idea proposed to Hermann Hamelmann in 1564, the Externsteine are identified as a sacred site of the pagan Saxons, and the location of the Irminsul (sacral pillar-like object in German paganism) idol reportedly destroyed by Charlemagne; there is however no archaeological evidence that would confirm the site's use during the relevant period.
The stones were used as the site of a hermitage in the Middle Ages, and by at least the high medieval period were the site of a Christian chapel. The Externsteine relief is a medieval depiction of the Descent from the Cross. It remains controversial whether the site was already used for Christian worship in the 8th to early 10th centuries.
The Externsteine gained prominence when Völkisch and nationalistic scholars took an interest in the late 19th and early 20th centuries. This interest peaked under the Nazi regime, when the Externsteine became a focus of nazi propaganda. Today, they remain a popular tourist destination and also continue to attract Neo-Pagans and Neo-Nazis.