The Nauvo Church was built probably between years 1430 and 1450 and it's dedicated to St. Olaf. The mural paintings were made in the 17th century. The most significant artefact in church is the crucifix from the beginning of 15th century. The oldest music instrument in Finland, organs called "Nauvon positiivi" (built probably in 1664), was originally in the Nauvo church. today it's preserved to the National Museum of Finland.
The Château de Foix dominates the town of Foix. An important tourist site, it is known as a centre of the Cathars. Built on an older 7th-century fortification, the castle is known from 987. In 1002, it was mentioned in the will of Roger I, Count of Carcassonne, who bequeathed the fortress to his youngest child, Bernard. In effect, the family ruling over the region were installed here which allowed them to control access to the upper Ariège valley and to keep surveillance from this strategic point over the lower land, protected behind impregnable walls.
In 1034, the castle became capital of the County of Foix and played a decisive role in medieval military history. During the two following centuries, the castle was home to Counts with shining personalities who became the soul of the Occitan resistance during the crusade against the Albigensians.