The church of San Giuliano is one of the oldest places of worship in Erice, dedicated to San Giuliano, martyred in 254 AD. Its construction was commissioned, according to tradition, by the Norman Grand Count Roger in the 11th century, but it has been a place of worship already during the first centuries of Christianity. It was rebuilt between 1612 and 1615, more imposing and with three naves. In 1927 it was closed due to a collapse and reopened after almost 80 years in 2005.
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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.