The Trier Imperial Baths (Kaiserthermen) are a large Roman bath complex, designated as part of the UNESCO World Heritage Site. The impressive ruins of the baths, along with the derelict rooms and the walls of previous structures, are among the most important to have been discovered in Trier. Today a visit to the thermal baths, which can also be explored below ground, is like stepping back in time. The walls of the hot bath (caldarium) are deservedly part of this famous landmark in Trier. After the one in Rome, the Imperial Thermal Baths and St. Barbara Roman Baths were once among the largest bathing complexes in the Roman empire. They were built in the first and second centuries AD.
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.