Château de Dieppe was founded in 1188 and destroyed in 1195. The site was restored in the 14th century. The castle was largely reconstructed by Charles des Marets in 1433. The castle is composed of a quadrangular enclosure with round flanking towers and a lower court adjacent. The large west tower dates perhaps from the 14th century, and served as the keep. Several architectural styles are represented, and flint and sandstone are used in the buildings. A brick bastion and various other buildings have been added to the original enclosure. The town walls were built around 1360. The walls were extended between 1435 and 1442. Although the town was largely destroyed by an Anglo-Dutch naval bombardment in 1694, the castle survived.
Until 1923, the castle housed the Ruffin barracks. It was bought by the town in 1903 and today is home to the Dieppe museum with its collection of ivories (crucifixes, rosaries, statuettes, fans, snuffboxes, etc.), maritime exhibits and the papers and belongings of Camille Saint-Saëns. The castle offers a panoramic view over the town and the coast.
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.