St. Mary's Cathedral stands in Danziger Straße and was built between 1890 and 1893 to the designs of Arnold Güldenpfennig. The church was erected in Romanesque revival style at the instigation of Bishop Bernhard Höting of Osnabrück, then simultaneously officiating as Vicar Apostolic of the Vicariate Apostolic of the Nordic Missions of Germany, then competent for Hamburg's Catholics. It was the first new Roman Catholic church built in Hamburg since the Reformation.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.