The Château de Brest (Breton: Kastell Brest, pronounced[ˈkastɛlbʀest]) or Castle of Brest is a castle in Brest, Finistère, Brittany, France. The oldest monument in the town, it is located at the mouth of the river Penfeld at the heart of the roadstead of Brest, one of the largest roadsteads in the world. From the Roman castellum to Vauban's citadel, the site has over 1700 years of history, holding right up to the present day its original role as a military fortress and a strategic location of the highest importance. It is thus the oldest castle in the world still in use, and was classified as a monument historique on 21 March 1923.
The structure's heterogeneous architecture has been the result of continual adaptations to developments in siege warfare and armament on land and sea. The château stands on the opposite bank to the Tour Tanguy combining to defend the entrance to the Penfeld.
Brest (French pronunciation:[bʁɛst]; Breton:[bʀest]) is a port city in the Finistère department, Brittany. Located in a sheltered bay not far from the western tip of a peninsula and the western extremity of metropolitan France, Brest is an important harbour and the second largest French military port after Toulon. The city is located on the western edge of continental France. With 139,456 inhabitants (2020), Brest forms Western Brittany's largest metropolitan area (with a population of 370,000 in total), ranking third behind only Nantes and Rennes in the whole of historic Brittany, and the 25th most populous city in France (2019); moreover, Brest provides services to the one million inhabitants of Western Brittany. Although Brest is by far the largest city in Finistère, the préfecture (administrative seat) of the department is in the much smaller town of Quimper.
During the Middle Ages, the history of Brest was the history of its castle. Then Richelieu made it a military harbour in 1631. Brest grew around its arsenal until the second part of the 20th century. Heavily damaged by the Allies' bombing raids during World War II, the city centre was completely rebuilt after the war. At the end of the 20th century and the beginning of the 21st century, the deindustrialization of the city was followed by the development of the service sector. Nowadays, Brest is an important university town with 23,000 students. Besides a multidisciplinary university, the University of Western Brittany, Brest and its surrounding area possess several prestigious French elite schools such as École Navale (the French Naval Academy), Télécom Bretagne and the Superior National School of Advanced Techniques of Brittany (ENSTA Bretagne, formerly ENSIETA). Brest is also an important research centre, mainly focused on the sea, with among others the largest Ifremer (French Research Institute for Exploitation of the Sea) centre, le Cedre (Centre of Documentation, Research and Experimentation on Accidental Water Pollution) and the French Polar Institute.
