St Pol de Léon's Church is said to have been founded in 490 by Paul Aurelian, a Welsh saint. The church building is medieval but was largely destroyed in a raid by the Spanish in 1595. It was rebuilt by 1600. The parish tower is constructed of granite with double buttresses. It is 27m tall and is surmounted with a turret 6.1 m tall, which serves as a daymark for shipping in Mount's Bay. The tower contains six bells.
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.