Architecturally, St Mary's Church was one of the most ambitious churches in the county. It is in the Decorated style with a prominent, integral, tower. The church was originally dedicated to St Leonard, until the mid-nineteenth century restoration. The porch, of the fourteenth/fifteenth centuries, has buttresses which display gargoyles and pinnacles.
The interior contains interesting, nineteenth-century, stained glass, including The Good Shepherd by Kempe & Co of 1930–31.
Next to the church stands The Procurator's House, a sixteenth house, now ruined, which belonged to the vicarage of Magor.
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.