The Château de Montrésor is a medieval castle with a Renaissance mansion built in the grounds. In about 1005, Fulk Nerra, count of Anjou, chose a rocky spur dominating the valley of the Indrois as the site for his captain Roger le Petit Diable ("Little Devil"), to build him a powerful fortress. Montrésor had one of the first keeps built in stone, similar to that at Loches, and two circular walls, but today only the west wall remains. In the 12th century, Montrésor fell into the hands of Henry II of England and the imposing towers at the entrance were built, as well as a part of the north curtain wall. In 1188, King Philip Augustus of France retook Montrésor from the English. André de Chauvigny, returning from the Third Crusade with Richard the Lionheart, became the new lord of Montrésor, before having to cede the castle for almost two centuries to the Palluau family. Demolished in 1203, the castle was rebuilt in 1393 for Jean IV de Bueil by Jean Binet, who put up the enclosure wall, the gatehouse and the existing outbuildings.
From the start of the 15th century, with the court spending more and more time in Touraine, Montrésor became a centre for courtesans and royal servants. In 1493, Imbert de Batarnay bought Montrésor to build an elegant residence in the feudal enclosure, of which only the main wing remains. Imbert was an influential councillor and chamberlain to four kings of France: Louis XI, Charles VIII, Louis XI and Francis I. This royal servant had a long tenure in this function, rare in this epoch, but he was skilful and cunning, and was present at all of the negotiations in his time - he was particularly responsible for arranging the marriage of Anne of Brittany to the king, sealing the joining of the Duchy of Brittany to the French kingdom. He was entrusted with preparations for war with Italy and the education of the children of Louis XII and François I.
During the 17th and 18th centuries, other leading families - such as the Bourdeilles and the Beauvilliers - lived in the castle. The French Revolution marked the beginning of its decline. Around 1845, count Jouffroy de Gonsan demolished the west wing of the Renaissance logis as well as the castle chapel. In 1849, Xavier Branicki, a rich Polish count and friend of emperor Napoleon III, arrived to give new life to Montrésor; Branicki undertook the complete restoration of the castle. He equipped the house with rich furnishings and roofs and the house was the setting for sumptuous feasts with Napoléon. Branicki's descendants still own the castle.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.