The original church at the site of Santa Croce was founded in 1080, outside the walls of the village under the patronage of Pope Gregory VII. With the expansion of the town, the church was rebuilt in 1596 using designs of Pellegrino Tibaldi.
One of the holy relics of the church is putatively a foot print of Christ, though made of Carrara marble, and, according to the tradition, dating back to the period of the Crusades. It is located between two of the chapels on a pilaster strip. In the third chapel on the right there is a canvas depicting the Adoration of Magi (1533) by Bernardino Lanino. In the fourth chapel, the altarpiece depicting St Michael defeating Satan by Guglielmo Caccia, also called Il Moncalvo. In the counterfacade there are two tempera canvases (1545) depicting Our Lady of the Annunciation and Archangel Gabriel, attributed to the Vigevanese painter Bernardino Ferrari.
The fourth chapel on the left exhibits a Virgin and Child and Saints by the 16th-century Venetian school and a 15th-century fresco representing St Augustine.
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.