Gothic Piarist church in Krems was built in 1014. It was refurbished in mid-15th century. Its choir was consecrated in 1457 and later sanctified again in 1508 following the adaptations. Its frescoes and altar are credited to the famous artist M. J. Schmidt in Baroque architectural style. The church was also the theological college of the Piarists between 1636 and 1641.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.