A citadel is the core fortified area of a town or city. It may be a fortress, castle, or fortified center. The term is a diminutive of "city" and thus means "little city", so called because it is a smaller part of the city of which it is the defensive core. Ancient Sparta had a citadel as did many other Greek cities and towns.
In a fortification with bastions, the citadel is the strongest part of the system, sometimes well inside the outer walls and bastions, but often forming part of the outer wall for the sake of economy. It is positioned to be the last line of defense, should the enemy breach the other components of the fortification system. A citadel is also a term of the third part of a medieval castle, with higher walls than the rest. It was to be the last line of defense before the keep itself.
Some of the oldest known structures which have served as citadels were built by the Indus Valley Civilisation, where the citadel represented a centralised authority. The main citadel in Indus Valley was almost 12 meters tall. The purpose of these structures, however, remains debated. Though the structures found in the ruins of Mohenjo-daro were walled, it is far from clear that these structures were defensive against enemy attacks. Rather, they may have been built to divert flood waters.
Several settlements in Anatolia, including the Assyrian city of Kaneš in modern-day Kültepe, featured citadels. Kaneš' citadel contained the city's palace, temples, and official buildings. The citadel of the Greek city of Mycenae was built atop a highly-defensible rectangular hill and was later surrounded by walls in order to increase its defensive capabilities.
In Ancient Greece, the Acropolis (literally: "high city"), placed on a commanding eminence, was important in the life of the people, serving as a refuge and stronghold in peril and containing military and food supplies, the shrine of the god and a royal palace. The most well-known is the Acropolis of Athens, but nearly every Greek city-state had one – the Acrocorinth famed as a particularly strong fortress. In a much later period, when Greece was ruled by the Latin Empire, the same strong points were used by the new feudal rulers for much the same purpose.
In the first millennium BCE, the Castro culture emerged in Northernwestern Portugal and Spain in the region extending from the Douro river up to the Minho, but soon expanding north along the coast, and east following the river valleys. It was an autochthonous evolution of Atlantic Bronze Age communities. In 2008, the origins of the Celts were attributed to this period by John T. Koch and supported by Barry Cunliffe. The Ave River Valley in Portugal was the core region of this culture, with a large number of small settlements (the castros), but also settlements known as citadels or oppida by the Roman conquerors. These had several rings of walls and the Roman conquest of the citadels of Abobriga, Lambriaca and Cinania around 138 B.C. was possible only by prolonged siege. Ruins of notable citadels still exist, and are known by archaeologists as Citânia de Briteiros, Citânia de Sanfins, Cividade de Terroso and Cividade de Bagunte.
Rebels who took power in the city but with the citadel still held by the former rulers could by no means regard their tenure of power as secure. One such incident played an important part in the history of the Maccabean Revolt against the Seleucid Empire. The Hellenistic garrison of Jerusalem and local supporters of the Seleucids held out for many years in the Acra citadel, making Maccabean rule in the rest of Jerusalem precarious. When finally gaining possession of the place, the Maccabeans pointedly destroyed and razed the Acra, though they constructed another citadel for their own use in a different part of Jerusalem.
At various periods, and particularly during the Middle Ages and the Renaissance, the citadel – having its own fortifications, independent of the city walls – was the last defence of a besieged army, often held after the town had been conquered. Locals and defending armies have often held out citadels long after the city had fallen. For example, in the 1543 Siege of Nice the Ottoman forces led by Barbarossa conquered and pillaged the town itself and took many captives – but the citadel itself held out.
In the Philippines The Ivatan people of the northern islands of Batanes often built fortifications to protect themselves during times of war. They built their so-called idjangs on hills and elevated areas.These fortifications were likened to European castles because of their purpose. Usually, the only entrance to the castles would be via a rope ladder that would only be lowered for the villagers and could be kept away when invaders arrived.
In time of war the citadel in many cases afforded retreat to the people living in the areas around the town. However, Citadels were often used also to protect a garrison or political power from the inhabitants of the town where it was located, being designed to ensure loyalty from the town that they defended.
For example, during the Dutch Wars of 1664-67, King Charles II of England constructed a Royal Citadel at Plymouth, an important channel port which needed to be defended from a possible naval attack. However, due to Plymouth's support for the Parliamentarians in the then-recent English Civil War, the Plymouth Citadel was so designed that its guns could fire on the town as well as on the sea approaches.
Barcelona had a great citadel built in 1714 to intimidate the Catalans against repeating their mid-17th- and early-18th-century rebellions against the Spanish central government. In the 19th century, when the political climate had liberalized enough to permit it, the people of Barcelona had the citadel torn down, and replaced it with the city's main central park, the Parc de la Ciutadella. A similar example is the Citadella in Budapest, Hungary.
The attack on the Bastille in the French Revolution – though afterwards remembered mainly for the release of the handful of prisoners incarcerated there – was to considerable degree motivated by the structure being a Royal citadel in the midst of revolutionary Paris.
Similarly, after Garibaldi's overthrow of Bourbon rule in Palermo, during the 1860 Unification of Italy, Palermo's Castellamare Citadel – symbol of the hated and oppressive former rule – was ceremoniously demolished.
Following Belgium declaring independence in 1830, a Dutch garrison under General David Hendrik Chassé held out in Antwerp Citadel between 1830 and 1832, while the city itself had already become part of the independent Belgium.
The Siege of the Alcázar in the Spanish Civil War, in which the Nationalists held out against a much larger Republican force for two months until relieved, shows that in some cases a citadel can be effective even in modern warfare; a similar case is the Battle of Huế during the Vietnam war, where a North Vietnamese Army division held the citadel of Huế for 26 days against roughly their own numbers of much better-equipped US and South Vietnamese troops.
The Citadelle of Québec (construction started 1673, completed 1820) still survives as the largest citadel still in official military operation in North America. It is home to the Royal 22nd Regiment of Canada; and forms part of the fortified walls of Vieux-Québec dating back to 1608. The Citadel, The Military College of South Carolina was established in 1842 in Charleston, South Carolina and still operates as a public college today.
Since the mid 20th century, citadels commonly enclose military command and control centres, rather than cities or strategic points of defense on the boundaries of a country. These modern citadels are built to protect the command center from heavy attacks, such as aerial or nuclear bombardment. The military citadels under London in the UK, including the massive underground complex Pindar beneath the Ministry of Defense, are examples, as is the Cheyenne Mountain nuclear bunker in the US.
On armored warships, the heavily armored section of the ship that protects the ammunition and machinery spaces is called the armored citadel.
A modern naval interpretation refers to the heaviest protected part of the hull as "The Vitals", and the citadel refers to the semi armoured freeboard above the vitals. Generally Anglo-American and German language follow this while Russian sources/language refer to "The Vitals" as "zitadel". Likewise Russian literature often refers to 'the turret' of a tank as 'the tower'.
The safe room on a ship is also called a citadel.
List of citadels
- Acra, Jerusalem (ruins)
- Antwerp Citadel, Belgium (demolished)
- Ark of Bukhara, Uzbekistan
- Bab Ksiba, Morocco
- Bam Citadel, Iran
- Beijing city fortifications, China (partially demolished)
- Brest Fortress, Belarus
- Cadmea, Greece (ruins)
- Cairo Citadel, Egypt
- Castillo San Felipe del Morro, United States
- Citadel of Aleppo, Syria (partly destroyed, getting rebuilt)
- Castle of Kars, Turkey
- Citadel Hill, Canada
- Citadel of Erbil, Iraq (partially ruined)
- Citadel of Liège, Belgium (partially demolished)
- Citadel Počitelj, Bosnia and Herzegovina
- Citadel Prins Frederik, Indonesia (demolished)
- Citadel of Salah Ed-Din, Syria (partially ruined)
- Citadella, Hungary
- Cittadella of Gozo, Malta
- Citadelle Laferrière, Haiti
- Citadelle of Quebec, Canada
- City Wall of Nanjing, China
- City Wall of Suzhou, China (partially demolished)
- Dublin Castle, Ireland
- Edinburgh Castle, United Kingdom
- Fort Santiago, Philippines
- Fortifications of Xi'an, China
- Fortress of Louisbourg, Canada
- Fortress of Ulm, Germany (partially demolished)
- Gradačac Castle, Bosnia and Herzegovina
- Hamina Fortress, Finland
- Hwaseong Fortress, South Korea
- Kaunas Fortress, Lithuania
- Lahore Fort, Pakistan
- Mainz Citadel, Germany
- Moscow Kremlin, Russia
- Commune of Neuf-Brisach, France
- Comune of Palmanova, Italy
- Petersberg Citadel, Germany
- Prague Castle, Czech Republic
- The Royal Citadel, United Kingdom
- Samuel's Fortress, Republic of Macedonia
- Spandau Citadel, Germany
- Stone City, China
- Suomenlinna, Finland
- Tower of David, Jerusalem
- Tower of London, United Kingdom
- Uzhhorod Castle, Ukraine
- Verne Citadel, United Kingdom
- Walls of Constantinople, Turkey (partially ruined)
- Walls of Dubrovnik, Croatia
- Walls of Genoa, Italy
- Walls of Nicosia, Cyprus
- Walls of Tallinn, Estonia
- Citadel of Ghazni, Afghanistan
- Herat Citadel, Afghanistan
- Alcazaba a term for Moorish citadels in Spain
- Arx (Roman)
- Fujian Tulou
- Kasbah a synonym
- Rocca (architecture)
- Thapar, B. K. (1975). "Kalibangan: A Harappan Metropolis Beyond the Indus Valley". Expedition. 17 (2): 19–32.
- Michel, Cecile (2016). Sharon R. Steadman, Gregory McMahon, ed. The Oxford Handbook of Ancient Anatolia: (10,000-323 BCE). Oxford. p. 313-320. ISBN 9780199336012.
- Thomas, Carol G.; Conant, Craig. Citadel to City-State: The Transformation of Greece, 1200-700 B.C.E. Indiana University Press. p. 2-10. ISBN 9780253216021.
- Koch, John (2009). Tartessian: Celtic from the Southwest at the Dawn of History in Acta Palaeohispanica X Palaeohispanica 9 (2009) (PDF). Palaeohispanica. pp. 339–351. ISSN 1578-5386. Archived (PDF) from the original on 23 June 2010. Retrieved 2010-05-17.
- Cunliffe, Barry (2008). A Race Apart: Insularity and Connectivity in Proceedings of the Prehistoric Society 75, 2009, pp. 55–64. The Prehistoric Society. p. 61.
- Armando Coelho Ferreira da Silva A Cultura Castreja no Noroeste de Portugal Museu Arqueológico da Citânia de Sanfins, 1986
- Don José de Santiago y Gómez (1896). Historia de Vigo y Su comarca. Imprenta y Lotografía Del Asilo De Huérfanos Del Sagrado Corázon de Jesús.
- "15 Most Intense Archaeological Discoveries in Philippine History". Filipknow.
- "Musée Royal 22e Régiment - La Citadelle". Retrieved 28 February 2014.
- "Canada's Historic Places - HistoricPlaces.ca". Retrieved 28 February 2014.
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