The Colegiata de Nuestra Señora de la Asunción was built in the sixteenth century in the town of Osuna. It was founded by Juan Téllez-Girón, 4th Count of Ureña.
The interior has a nave and two aisles, five chapels and a presbytery. The interior of the church has a rich Renaissance decoration. It has a beautiful Baroque main altar, made throughout the eighteenth century, and the chapels on the sides are all very attractive. In the interior, the huge sacristy is now a museum that exhibits a magnificent collection with five paintings by José de Ribera (El Españoleto) and a carving by Juan de Mesa.
There is a Pantheon of the Dukes on a lower level that was built in Plateresque style in 1545 and contains a small chapel with an altarpiece attributed to Roque Balduque, a paint of Hernando de Esturmio, and the tombs of the Dukes of Osuna.
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.