The Mir (Mirsky) Castle Complex was listed as a UNESCO World Heritage site in 2000. Duke Yuri Ilyinich began construction of the castle near the village of Mir after the turn of the 16th century in the Gothic architectural style. Five towers surrounded the courtyard of the citadel, the walls of which formed a square of 75 meters on each side. In 1568, when the Ilyinich dynasty died out, the Mir Castle passed into the hands of Mikołaj Krzysztof 'the Orphan' Radziwiłł, who refitted it with a two-winged, three-story stately residence along the eastern and northern inner walls of the castle. Plastered facades were decorated with limestone portals, plates, balconies and porches in the Renaissance style.
In 1817, after the castle had been abandoned for nearly a century and had suffered severe damage in the Napoleonic wars, owner Dominik Hieronim Radziwiłł died of battle injuries and the castle passed to his daughter Stefania, who married Ludwig zu Sayn-Wittgenstein-Berleburg. Later the castle became a possession of their daughter Maria, who married Prince Chlodwig Hohenlohe-Schillingsfürst.
Their son, Maurice Hohenlohe-Schillingsfürst, sold the castle to Nikolai Sviatopolk-Mirski, of the Bialynia clan, in 1895. Nikolaj's son Michail began to rebuild the castle according to the plans of architect Teodor Bursze. The Sviatopolk-Mirski family owned the castle until 1939, when the Soviet Union occupied eastern Poland.
When German forces invaded the Soviet Union in 1941 they occupied the castle and converted it to a ghetto for the local Jewish population, prior to their liquidation. Between 1944 and 1956, the castle was used as a housing facility, resulting in damage to the castle's interior.
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.