Kurzętnik Castle was built by Teutonic Knights in the 14th century. The construction began around 1331 and was completed before 1361. The large castle was 110m long and 42m wide. The first floors were built of granite and upper were brick-made. There was a chapel church in the inner yard. The suffered damages in wars between Teutonic Order and Poland-Lithuanian Commonwealth in 1410s and again in 1659 in Swedish army attack. In the 19th century the existing castle was demolished. Today some outer walls and foundations exist.
The Château Comtal (Count’s Castle) is a medieval castle within the Cité of Carcassonne, the largest city in Europe with its city walls still intact. The Château Comtal has a strong claim to be called a 'Cathar Castle'. When the Catholic Crusader army arrived in 1209 they first attacked Raymond-Roger Trencavel's castrum at Bèziers and then moved on to his main stronghold at Carcassonne.
The castle with rectangular shape is separated from the city by a deep ditch and defended by two barbicans. There are six towers curtain walls.
The castle was restored in 1853 by the architect Eugène Viollet-le-Duc. It was added to the UNESCO list of World Heritage Sites in 1997.