A citadel is the core fortified area of a town or

city A city is a human settlement of notable size.Goodall, B. (1987) ''The Penguin Dictionary of Human Geography''. London: Penguin.Kuper, A. and Kuper, J., eds (1996) ''The Social Science Encyclopedia''. 2nd edition. London: Routledge. It can be def ...

. It may be a castle, fortress, or fortified center. The term is a diminutive of "city", meaning "little city", because it is a smaller part of the city of which it is the defensive core. In a

fortification A fortification is a military construction or building designed for the defense of territories in warfare, and is also used to establish rule in a region during peacetime. The term is derived from Latin ''fortis'' ("strong") and ''facere' ...

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 defence, 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.

History

3300–1300 BC

Some of the oldest known structures which have served as citadels were built by the

Indus Valley civilisation The Indus Valley Civilisation (IVC), also known as the Indus Civilisation was a Bronze Age civilisation in the northwestern regions of South Asia, lasting from 3300 BCE to 1300 BCE, and in its mature form 2600 BCE to 1900& ...

, 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 Mohenjo-daro (; sd, موئن جو دڙو'', ''meaning 'Mound of the Dead Men';Anatolia Anatolia, tr, Anadolu Yarımadası), and the Anatolian plateau, also known as Asia Minor, is a large peninsula in Western Asia and the westernmost protrusion of the Asian continent. It constitutes the major part of modern-day Turkey. The ...

, including the Assyrian city of Kaneš in modern-day

Kültepe Kültepe ( Turkish: ''ash-hill''), also known as Kanesh or Nesha, is an archaeological site in Kayseri Province, Turkey, inhabited from the beginning of the 3rd millennium BC, in the Early Bronze Age.Kloekhorst, Alwin, (2019)Kanišite Hittite: ...

, featured citadels. Kaneš' citadel contained the city's palace, temples, and official buildings. The citadel of the Greek city of

Mycenae Mycenae ( ; grc, Μυκῆναι or , ''Mykē̂nai'' or ''Mykḗnē'') is an archaeological site near Mykines in Argolis, north-eastern Peloponnese, Greece. It is located about south-west of Athens; north of Argos; and south of Corinth. ...

was built atop a highly-defensible rectangular hill and was later surrounded by walls in order to increase its defensive capabilities.

800 BC – 400 AD

Ancient Greece Ancient Greece ( el, Ἑλλάς, Hellás) was a northeastern Mediterranean Sea, Mediterranean civilization, existing from the Greek Dark Ages of the 12th–9th centuries BC to the end of Classical Antiquity, classical antiquity ( AD 600), th ...

, the Acropolis, which literally means "high city", placed on a commanding eminence, was important in the life of the people, serving as a lookout, a refuge, and a stronghold in peril, as well as containing military and food supplies, the

shrine A shrine ( la, scrinium "case or chest for books or papers"; Old French: ''escrin'' "box or case") is a sacred or holy space dedicated to a specific deity, ancestor, hero, martyr, saint, daemon, or similar figure of respect, wherein they ...

of the god and a royal palace. The most well known is the

Acropolis of Athens The Acropolis of Athens is an ancient citadel located on a rocky outcrop above the city of Athens and contains the remains of several ancient buildings of great architectural and historical significance, the most famous being the Parthenon. Th ...

, but nearly every Greek city-state had one – the

Acrocorinth Acrocorinth ( el, Ακροκόρινθος), "Upper Corinth", the acropolis of ancient Corinth, is a monolithic rock overseeing the ancient city of Corinth, Greece. In the estimation of George Forrest, "It is the most impressive of the acropolis ...

famed as a particularly strong fortress. In a much later period, when Greece was ruled by the

Latin Empire The Latin Empire, also referred to as the Latin Empire of Constantinople, was a feudal Crusader state founded by the leaders of the Fourth Crusade on lands captured from the Byzantine Empire. The Latin Empire was intended to replace the Byzant ...

, the same strong points were used by the new feudal rulers for much the same purpose. In the first millennium BC, the

Castro culture Castro culture ( gl, cultura castrexa, pt, cultura castreja, ast, cultura castriega, es, cultura castreña, meaning "culture of the hillforts") is the archaeological term for the material culture of the northwestern regions of the Iberian Pe ...

emerged in northwestern Portugal and Spain in the region extending from the

Douro The Douro (, , ; es, Duero ; la, Durius) is the highest-flow river of the Iberian Peninsula. It rises near Duruelo de la Sierra in Soria Province, central Spain, meanders south briefly then flows generally west through the north-west part o ...

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 The Atlantic Bronze Age is a cultural complex of the Bronze Age period in Prehistoric Europe of approximately 1300–700 BC that includes different cultures in Britain, France, Ireland, Portugal, and Spain. Trade The Atlantic Bronze Age ...

communities. In 2008, the origins of the

Celts The Celts (, see pronunciation for different usages) or Celtic peoples () are. "CELTS location: Greater Europe time period: Second millennium B.C.E. to present ancestry: Celtic a collection of Indo-European peoples. "The Celts, an ancien ...

were attributed to this period by

John T. Koch John T. Koch is an American academic, historian and linguist who specializes in Celtic studies, especially prehistory and the early Middle Ages. He is the editor of the five-volume ''Celtic Culture. A Historical Encyclopedia'' (2006, ABC Clio). He ...

and supported by Barry Cunliffe. The

Ave River Ave River ( pt, Rio Ave; ) is a river in Northern Portugal. It has its source in the Cabreira Mountain (Serra da Cabreira) in the Minho Region. In its course passes through the cities of Guimaraes , Vizela , Santo Tirso , Trofa and Vila do ...

Valley in Portugal was the core region of this culture,Armando Coelho Ferreira da Silva. ''A Cultura Castreja no Noroeste de Portugal''. Museu Arqueológico da Citânia de Sanfins, 1986 with a large number of small settlements (the ''castros''), but also settlements known as citadels or

oppida An ''oppidum'' (plural ''oppida'') is a large fortified Iron Age settlement or town. ''Oppida'' are primarily associated with the Celtic late La Tène culture, emerging during the 2nd and 1st centuries BC, spread across Europe, stretch ...

by the Roman conquerors. These had several rings of walls and the Roman conquest of the citadels of Abobriga, Lambriaca and Cinania around 138 BC was possible only by prolonged

siege A siege is a military blockade of a city, or fortress, with the intent of conquering by attrition, or a well-prepared assault. This derives from la, sedere, lit=to sit. Siege warfare is a form of constant, low-intensity conflict characteriz ...

. Ruins of notable citadels still exist, and are known by archaeologists as

Citânia de Briteiros The Citânia de Briteiros is an archaeological site of the Castro culture located in the Portuguese civil parish of Briteiros São Salvador e Briteiros Santa Leocádia in the municipality of Guimarães; important for its size, "urban" form and d ...

Citânia de Sanfins The Citância de Sanfins is an archaeological site of the Castro culture located in the Portuguese civil parish of Sanfins de Ferreira in the municipality of Paços de Ferreira. The construction of the Castro site developed over many phases, bet ...

Cividade de Terroso Cividade de Terroso was an ancient city of the Castro culture in North-western coast of the Iberian Peninsula, situated near the present bed of the Ave river, in the suburbs of present-day Póvoa de Varzim, Portugal. Located in the heart of the ...

and Cividade de Bagunte.

167–160 BC

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 The Maccabean Revolt ( he, מרד החשמונאים) was a Jewish rebellion led by the Maccabees against the Seleucid Empire and against Hellenistic influence on Jewish life. The main phase of the revolt lasted from 167–160 BCE and ende ...

against the Seleucid Empire. The

Hellenistic In Classical antiquity, the Hellenistic period covers the time in Mediterranean history after Classical Greece, between the death of Alexander the Great in 323 BC and the emergence of the Roman Empire, as signified by the Battle of Actium in ...

garrison of

Jerusalem Jerusalem (; he, יְרוּשָׁלַיִם ; ar, القُدس ) (combining the Biblical and common usage Arabic names); grc, Ἱερουσαλήμ/Ἰεροσόλυμα, Hierousalḗm/Hierosóluma; hy, Երուսաղեմ, Erusałēm. i ...

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.

400–1600

At various periods, and particularly during the

Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire ...

and the

Renaissance The Renaissance ( , ) , from , with the same meanings. is a period in European history The history of Europe is traditionally divided into four time periods: prehistoric Europe (prior to about 800 BC), classical antiquity (800 BC to AD ...

, 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 siege of Nice occurred in 1543 and was part of the Italian War of 1542–46 in which Francis I and Suleiman the Magnificent collaborated as part of the Franco-Ottoman alliance against the Holy Roman Emperor Charles V, and Henry VIII of Eng ...

the Ottoman forces led by

Barbarossa Barbarossa, a name meaning "red beard" in Italian, primarily refers to: * Frederick Barbarossa (1122–1190), Holy Roman Emperor * Hayreddin Barbarossa (c. 1478–1546), Ottoman admiral * Operation Barbarossa, the Axis invasion of the Soviet Un ...

conquered and pillaged the town and took many captives, but the citadel held out. In the

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

, the

Ivatan people The Ivatan people are an Austronesian ethnolinguistic group native to the Batanes and Babuyan Islands of the northernmost Philippines. They are genetically closely-related to other ethnic groups in Northern Luzon, but also share close linguist ...

of the northern islands of Batanes often built fortifications to protect themselves during times of war. They built their so-called ''

idjang Ijangs are the terraced and defended settlements on hill tops and ridges in the Batanes Islands in the Philippines. These high rocky formations can serve as fortress or refuge against attacking enemies for the Ivatan people. Background In 1994, E ...

s'' 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.

1600 to the present

In times 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. This was used, 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 English Civil War (1642–1651) was a series of civil wars and political machinations between Parliamentarians (" Roundheads") and Royalists led by Charles I ("Cavaliers"), mainly over the manner of England's governance and issues of re ...

, the Plymouth Citadel was so designed that its guns could fire on the town as well as on the sea approaches.

Barcelona Barcelona ( , , ) is a city on the coast of northeastern Spain. It is the capital and largest city of the autonomous community of Catalonia, as well as the second most populous municipality of Spain. With a population of 1.6 million within ci ...

had a great citadel built in 1714 to intimidate the

Catalans Catalans (Catalan, French and Occitan: ''catalans''; es, catalanes, Italian: ''catalani'', sc, cadelanos) are a Romance ethnic group native to Catalonia, who speak Catalan. The current official category of "Catalans" is that of the citize ...

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 The (; "Citadel Park") is a park on the northeastern edge of Ciutat Vella, Barcelona, Catalonia, Spain. For decades following its creation in the mid-19th century, this park was the city's only green space. The grounds include the city zoo (o ...

. A similar example is the

Citadella The Citadella is the fortification located upon the top of Gellért Hill in Budapest, Hungary. ''Citadella'' is the Hungarian word for citadel, a kind of fortress. The word is exclusively used by other languages to refer to the Gellért Hill ...

Budapest Budapest (, ; ) is the capital and most populous city of Hungary. It is the ninth-largest city in the European Union by population within city limits and the second-largest city on the Danube river; the city has an estimated population ...

, Hungary. The attack on the

Bastille The Bastille (, ) was a fortress in Paris, known formally as the Bastille Saint-Antoine. It played an important role in the internal conflicts of France and for most of its history was used as a state prison by the kings of France. It was stor ...

in the

French Revolution The French Revolution ( ) was a period of radical political and societal change in France that began with the Estates General of 1789 and ended with the formation of the French Consulate in coup of 18 Brumaire, November 1799. Many of its ...

– 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 Giuseppe Maria Garibaldi ( , ;In his native Ligurian language, he is known as ''Gioxeppe Gaibado''. In his particular Niçard dialect of Ligurian, he was known as ''Jousé'' or ''Josep''. 4 July 1807 – 2 June 1882) was an Italian general, pat ...

's overthrow of

Bourbon Bourbon may refer to: Food and drink * Bourbon whiskey, an American whiskey made using a corn-based mash * Bourbon barrel aged beer, a type of beer aged in bourbon barrels * Bourbon biscuit, a chocolate sandwich biscuit * A beer produced by Bras ...

rule in Palermo, during the 1860

Unification of Italy The unification of Italy ( it, Unità d'Italia ), also known as the ''Risorgimento'' (, ; ), was the 19th-century political and social movement that resulted in the consolidation of different states of the Italian Peninsula into a single ...

, Palermo's Castellamare Citadel – a symbol of the hated and oppressive former rule – was ceremoniously demolished. Following Belgium gaining its 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 independent Belgium. The

Siege of the Alcázar The Siege of the Alcázar was a highly symbolic Nationalist victory in Toledo in the opening stages of the Spanish Civil War. The Alcázar of Toledo was held by a variety of military forces in favour of the Nationalist uprising. Militias of th ...

in the

Spanish Civil War The Spanish Civil War ( es, Guerra Civil Española)) or The Revolution ( es, La Revolución, link=no) among Nationalists, the Fourth Carlist War ( es, Cuarta Guerra Carlista, link=no) among Carlists, and The Rebellion ( es, La Rebelión, link ...

, 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 The Vietnam War (also known by other names) was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vietnam a ...

, where a

North Vietnamese Army The People's Army of Vietnam (PAVN; vi, Quân đội nhân dân Việt Nam, QĐNDVN), also recognized as the Vietnam People's Army (VPA) or the Vietnamese Army (), is the military force of the Socialist Republic of Vietnam and the armed win ...

division held the citadel of Huế for 26 days against roughly their own numbers of much better-equipped US and South Vietnamese troops.

Modern usage

The

Citadelle of Québec The Citadelle of Quebec (french: Citadelle de Québec), also known as ''La Citadelle'', is an active military installation and the secondary official residence of both the Canadian monarch and the governor general of Canada. It is located atop Cap ...

(the construction was started in

1673 Events January–March * January 22 – Impostor Mary Carleton is hanged at Newgate Prison in London, for multiple thefts and returning from penal transportation. * February 10 – Molière's ''comédie-ballet'' ''The Imag ...

and completed in 1820) still survives as the largest citadel still in official military operation in North America. It is home to the

Royal 22nd Regiment , colors = Scarlet with blue facings (full dress and mess dress) , march = Quick: ''Vive la Canadienne''Slow: ''Marche lente du Royal 22e Régiment: La Prière en famille'' , mascot ...

of the

Canadian Army The Canadian Army (french: Armée canadienne) is the command responsible for the operational readiness of the conventional ground forces of the Canadian Armed Forces. It maintains regular forces units at bases across Canada, and is also res ...

and forms part of the

Ramparts of Quebec City The ramparts of Quebec City is a city wall that surrounds the western end of Old Quebec's Upper Town in Quebec City, Quebec, Canada. The ramparts date back to the 17th century, with the ramparts having undergone a succession of modifications and i ...

dating back to 1620s. Since the mid 20th century, citadels have commonly enclosed military command and control centres, rather than cities or strategic points of defence on the boundaries of a country. These modern citadels are built to protect the command centre from heavy attacks, such as aerial or nuclear bombardment. The

military citadels under London A number of military citadels are known to have been constructed underground in central London, dating mostly from the Second World War and the Cold War. Unlike traditional above-ground citadels, these sites are primarily secure centres for defen ...

in the UK, including the massive underground complex Pindar beneath the Ministry of Defence, are examples, as is the

Cheyenne Mountain nuclear bunker The Cheyenne Mountain Complex is a Space Force installation and defensive bunker located in unincorporated El Paso County, Colorado, next to the city of Colorado Springs, at the Cheyenne Mountain Space Force Station, which hosts the activities of ...

in the US.

Naval term

On armoured warships, the heavily armoured section of the ship that protects the ammunition and machinery spaces is called the armoured citadel. A modern naval interpretation refers to the heaviest protected part of the hull as "the vitals", and the citadel is the semi-armoured freeboard above the vitals. Generally, Anglo-American and German languages follow this while Russian sources/language refer to "the vitals" as цитадель "citadel". Likewise, Russian literature often refers to the turret of a tank as the 'tower'. The

safe room A safe room or panic room is a fortified room that is installed in a private residence or business to provide a safe shelter, or hiding place, for the inhabitants in the event of a break in, home invasion, tornado, terror attack, or other thr ...

on a ship is also called a citadel.

List of citadels

* Amman Citadel, Amman, Jordan * Antwerp Citadel, Belgium (demolished) * Bam Citadel, Iran *

Cairo Citadel The Citadel of Cairo or Citadel of Saladin ( ar, قلعة صلاح الدين, Qalaʿat Salāḥ ad-Dīn) is a medieval Islamic-era fortification in Cairo Cairo ( ; ar, القاهرة, al-Qāhirah, ) is the Capital city, capital of Egypt ...

, Egypt *

Kastellet, Copenhagen ''Kastellet'' () is a citadel located in Copenhagen, Denmark. It is one of the best preserved fortresses in Northern Europe. It is constructed in the form of a pentagon with bastions at its corners. Kastellet was continuous with the ring of bas ...

, Denmark *

Citadel of Aleppo The Citadel of Aleppo ( ar, قلعة حلب, Qalʿat Ḥalab) is a large medieval fortified palace in the centre of the old city of Aleppo, northern Syria. It is considered to be one of the oldest and largest castles in the world. Usage ...

, Syria (partly destroyed, being rebuilt) *

Citadel of Erbil The Erbil Citadel, locally called Qelat ( ku, قەڵای ھەولێر ) is a Tell (archaeology), tell or occupied mound, and the historical city centre of Erbil in the Kurdistan Region. The citadel has been inscribed on the World Heritage List si ...

, Iraq (partially ruined) * Citadel of Ghazni, Afghanistan *

Citadel of Liège The Citadel of Liège was the central fortification of the strategic Belgian city of Liège, Wallonia until the end of the 19th century. It is located in the Sainte-Walburge neighborhood, above the Meuse valley. The first citadel was built on ...

, Belgium (partially demolished) * Citadel Počitelj, Bosnia and Herzegovina *

Citadel Prins Frederik The Citadel Prins Frederik, also called Fort Prins Frederik, was a fortification built in 1837 by the Dutch in Batavia (now Jakarta), in the Dutch East Indies (now Indonesia). It was located at Wilhelmina Park, which demolished around 1961 and r ...

, Indonesia (demolished) *

Citadel of Salah Ed-Din Sahyun Castle ( ar, قلعة صهيون), also known as the Castle of Saladin ( ar, قلعة صلاح الدين, Qal'at Salah al-Din), is a medieval castle in northwestern Syria. It is located 7 km east of Al-Haffah town and 30 km eas ...

, Syria (partially ruined) *

, Hungary *

Cittadella Cittadella ( vec, Sitadeła) is a medieval walled city in the province of Padua, northern Italy, founded in the 13th century as a military outpost of Padua. The surrounding wall has been restored and is in circumference with a diameter of around ...

, Italy *

Cittadella (Gozo) The Cittadella ( mt, Iċ-Ċittadella), also known as the Castello ( mt, Il-Kastell), is the citadel of Victoria on the island of Gozo, Malta. The area has been inhabited since the Bronze Age, and the site now occupied by the Cittadella is beli ...

, Malta *

Citadelle Laferrière The Citadelle Henry Christophe , or simply the Citadelle ( en, Citadel), is a large early 19th-century fortress situated on the Bonnet à l'Evêque mountaintop in Nord, Haiti. The imposing structure is located approximately south of the city of ...

, Haiti *

Citadelle of Quebec The Citadelle of Quebec (french: Citadelle de Québec), also known as ''La Citadelle'', is an active military installation and the secondary official residence of both the Canadian monarch and the governor general of Canada. It is located atop C ...

, Canada *

Halifax Citadel Citadel Hill is a hill that is a National Historic Site in Halifax, Nova Scotia, Canada. Four fortifications have been constructed on Citadel Hill since the city was founded by the English in 1749, and were referred to as Fort George—but only ...

, Canada * Herat Citadel, Afghanistan *

Intramuros Intramuros (Latin for "inside the walls") is the historic walled area within the city of Manila, the capital of the Philippines. It is administered by the Intramuros Administration with the help of the city government of Manila. Present-day ...

, Philippines * Jerusalem Citadel or

Tower of David The Tower of David ( he, מגדל דוד, Migdál Davíd), also known as the Citadel ( ar, القلعة, al-Qala'a), is an ancient citadel located near the Jaffa Gate entrance to the Old City of Jerusalem. The citadel that stands today dates ...

, Israel * Kirkuk Citadel, Iraq *

Landskrona Citadel Landskrona Citadel ( sv, Citadellet or ''Landskrona slott'') is situated in Landskrona, Scania, southern Sweden. Much of the original work is intact. Examples remain of all major parts of the fortification, which is uncommon in such an accessible ...

, Sweden *

Mainz Citadel The Mainzer Zitadelle (Citadel of Mainz) is situated at the fringe of , near Mainz Römisches Theater station. The fortress was constructed in 1660 and was an important part of the Fortress Mainz. History The Jakobsberg hill, where the citadel ...

, Germany * Petersberg Citadel, Germany *

Royal Citadel, Plymouth The Royal Citadel in Plymouth, Devon, England, was built in the late 1660s to the design of Sir Bernard de Gomme. It is at the eastern end of Plymouth Hoe overlooking Plymouth Sound, and encompasses the site of the earlier fort that had been bu ...

, United Kingdom * Spandau Citadel, Germany *

Tal Afar Citadel The Tal Afar Citadel ( tr, Telafer Kalesi) is a citadel located in Tal Afar, a city in Nineveh Governorate in northwest Iraq. The citadel was built by the Ottoman Empire, although it contains remains dating back to the Assyrian period. Followin ...

, Iraq *

Verne Citadel Verne Citadel is a 19th-century citadel on the Isle of Portland, Dorset, England. Located on the highest point of Portland, Verne Hill, it sits in a commanding position overlooking Portland Harbour, which it was built to defend. It later became H ...

, United Kingdom *

Warsaw Citadel Warsaw Citadel (Polish: Cytadela Warszawska) is a 19th-century fortress in Warsaw, Poland. It was built by order of Tsar Nicholas I after the suppression of the 1830 November Uprising in order to bolster imperial Russian control of the city. ...

, Poland *

Vyšehrad Vyšehrad ( Czech for "upper castle") is a historic fort in Prague, Czech Republic, just over 3 km southeast of Prague Castle, on the east bank of the Vltava River. It was probably built in the 10th century. Inside the fort are the Basil ...

, Czech Republic *

Špilberk Castle Špilberk Castle (German: ''Spielberg'', locally ''Špilas'') is a castle on the hilltop in Brno, Southern Moravia. Its construction began as early as the first half of the 13th century by the Přemyslid kings and complete by King Ottokar II of ...

, Czech Republic * Citadel of Lille, France * Citadel of Calais, France * Peter and Paul Fortress, Saint Petersburg, Russia

References

External links

* {{Authority control Fortifications by type Military strategy