The Arnau Church of St. Catherine of Alexandria is a Brick Gothic church built in the 14th century. It contains more than 200 medieval frescoes. The Soviets used the church for grain storage. It was not until 2003 that a restoration campaign was launched. The building belongs to the Kaliningrad History Museum and is used for exhibitions and orthodox liturgy.References:
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.