The Château de Saint-Izaire is a 14th-century episcopal castle. It is maintained by an association known as Vie et Château (Life and Castle), who have created a mini museum on the premises to record the history of the castle and the inhabitants of the village of Saint-Izaire.
The castle is a massive quadrangular red stone building that shelters the town hall of the village of Saint-Izaire. The structure is supported by a keep-tower in the southern wing (partially demolished since the 19th century). This keep contains mural frescoes dating from the 14th century, and the ceiling in the room of the bishops in the Baroque style of the 17th century.
The castle was built by Guillaume Rotlindes, ancestor of the current Rollinde de Beaumont. It was intended as a gift to the Abbey of Vabres, close to the commune of Saint-Affrique: the deed attesting the gift is preserved to the present day. The castle was often used as a summer residence by the abbey. When the cathedral and palace of Vabres were razed in the wars of religion, the castle was used by refugees from the abbey.
The Château de Saint-Izaire is one of a group of 23 castles in Aveyron who have joined together to provide a tourist itinerary as the Route des Seigneurs du Rouergue.References:
The Petersberg Citadel is one of the largest extant early-modern citadels in Europe and covers the whole north-western part of the Erfurt city centre. It was built after 1665 on Petersberg hill and was in military use until 1963. It dates from a time when Erfurt was ruled by the Electors of Mainz and is a unique example of the European style of fortress construction. Beneath the citadel is an underground maze of passageways that can be visited on guided tours organised by Erfurt Tourist Office.
The citadel was originally built on the site of a medieval Benedictine Monastery and the earliest parts of the complex date from the 12th century. Erfurt has also been ruled by Sweden, Prussia, Napoleon, the German Empire, the Nazis, and post-World War II Soviet occupying forces, and it was part of the German Democratic Republic (East Germany). All of these regimes used Petersberg Citadel and had an influence on its development. The baroque fortress was in military use until 1963. Since German reunification in 1990, the citadel has undergone significant restoration and it is now open to the public as a historic site.