St. Olav's Church stone church was built before 1150 and probably Telemark's largest stone church in former times. It had a number of unusual building features, including lektorium and a separate room for earthly values, which today is called 'Mary's Chapel'. Probably the church was the main church in Grenland, a kind of 'county church' and therefore had the highest status of all churches in the area. Today the church ruins are located next to the newer Bamble Church.
References: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.