This article is about the fortification.
For the military college, see The Citadel.
A citadel is the core fortified area of a town or city.
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.
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.
The functions of the police and the army, as well as the army barracks were developed in the citadel.
Some of the oldest known structures which have served as citadels were built by the Indus Valley Civilisation, where citadels represented a centralised authority.
Citadels in Indus Valley were 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.
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.
800 BCE – 400 CE
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.
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 northwestern 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.
These had several rings of walls and the Roman conquest of the citadels of Abobriga, Lambriaca and Cinania around 138 BCE was possible only by prolonged siege.
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.
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.
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 1664–1667, 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.
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.
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's 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 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.
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.
List of citadels
See also: List of forts
- Alcazaba a term for Moorish citadels in Spain
- Arx (Roman)
- Fujian Tulou
- Kasbah a synonym
- Kremlin (fortification)
- Rocca (architecture)
Credits to the contents of this page go to the authors of the corresponding Wikipedia page: en.wikipedia.org/wiki/Citadel.