The oldest castle in the world and the biggest: Aleppo, Doué-la-Fontaine, the Tower of London, Windsor, Prague, Malbork and the ones still lived in

Architecture · 4 September 2026

The oldest castle in the world, if a castle is a fortified residence of a lord, is usually named as the Citadel of Aleppo in Syria, on a hill fortified since the 3rd millennium BC and walled as the present castle from the 12th century; the oldest in Europe is the stone hall at Doué-la-Fontaine in the Loire valley, built about 900 and fortified about 950, the first known building of the type, with the motte-and-bailey castles of the 10th century after it, Langeais of 994 the oldest stone keep, and the White Tower of the Tower of London of 1078 the oldest keep still standing complete; the oldest castle still lived in is Windsor, home of the English kings since Henry I in 1110. The biggest is a matter of measurement: Malbork in Poland, the Teutonic Knights' brick fortress of 1274–1406, covers 21 hectares and is the largest by land area, Prague Castle covers 7 hectares and holds the Guinness record as the largest coherent castle complex, and Windsor, at 5 hectares, is the largest inhabited. Below: the oldest by kind and country, the biggest by kind and country, the ones still homes, and the arguments, with how they were built in how castles were built and the Tower and Wawel in the Buildings by style collection.

What counts as a castle

A castle, in the sense historians use, is a fortified residence of a lord, a private stronghold that is both a home and a fortress, and the type belongs to feudal Europe between the 10th and 16th centuries and to Japan, the Islamic world and the Crusader states in their own forms; a walled city, a Roman fort, a hill fort of the Iron Age or a royal palace with a wall is not a castle, though all are called castles, and the "oldest castle in the world" lists mix them. By the strict definition the castle was invented in France in the 10th century, when the counts and lords of the collapsing Carolingian state built themselves private fortresses of earth, timber and then stone, and the oldest castles are French; by the loose definition, fortified residences go back to the Bronze Age, and the oldest are in the Near East. Castle.

The oldest

• Citadel of Aleppo, Syria (hill since 3000 BC, castle 12th–13th centuries). A limestone hill in the middle of the city, with a temple of the storm god of the 3rd millennium BC found on top, fortified by the Greeks, Romans, Byzantines and Arabs, and given its present walls, gate, moat and glacis by the Ayyubid sultan al-Zahir Ghazi about 1200; the oldest continuously fortified site that is called a castle, and the largest medieval castle in the Middle East, damaged in the war of 2012–16 and reopened in 2017.
• Doué-la-Fontaine, France (about 900, fortified 950). A stone hall of the Counts of Blois, excavated by Michel de Boüard in the 1960s, whose ground-floor doors were blocked and a first-floor entrance made about 950, turning a residence into a keep; the oldest known castle in the sense of a private fortified residence. Nothing stands above the foundations.
• Langeais, France (994). The stone keep of Fulk Nerra, Count of Anjou, the oldest surviving stone keep in France and probably in Europe, a ruin beside the 15th-century château.
• Motte-and-bailey castles (from about 950). An earth mound with a timber tower and a fenced yard, the castle the Normans took to England in 1066, of which thousands of mounds survive; the oldest in England are of 1066–70, at Hastings, Pevensey and Berkhamsted, and the oldest in Ireland of the 1170s.
• The White Tower, Tower of London (1078–1100). William the Conqueror's keep, of Caen stone, 27 m high with walls 4.5 m thick, the oldest complete keep in Europe and the oldest building in London in continuous use, with the Chapel of St John of 1080 inside; the Tower has been fortress, palace, prison, mint, zoo and treasury and holds the Crown Jewels. Tower of London.
• Windsor Castle, England (1070, stone from 1110). A motte of William the Conqueror's, given stone buildings by Henry I, who lived there from 1110, and by Henry II, Edward III, who rebuilt it in 1350–77 as the Gothic palace, and George IV; the oldest castle in the world continuously occupied as a residence, and the home of the British monarch.
• Reichsburg Cochem, Germany (about 1000), and Marksburg (1117), the only Rhine castle never destroyed; Castel dell'Ovo, Naples, on a Roman villa, fortified in the 12th century; Rochester (1127) and Dover (1180s), the great English keeps; Killyleagh in Ireland (1180), claimed as the oldest inhabited in Ireland.
• Japan. Inuyama (1537) claims the oldest original keep; Himeji (1609) is the largest and best.
• Outside Europe and Asia. Fasil Ghebbi at Gondar in Ethiopia (1636); the Castillo de San Marcos in Florida (1672), the oldest in the United States, a fort rather than a residence.

The biggest

• Malbork, Poland (1274–1406). The castle of the Grand Masters of the Teutonic Knights, three castles in one on the Nogat, of brick, 21 hectares within the walls and 143,000 square metres of buildings, the largest castle in the world by land area and the largest brick building in Europe; ruined in 1945 and rebuilt, a World Heritage Site since 1997.
• Prague Castle, Czech Republic (from 870). A hill fortress of the dukes of Bohemia become a complex of palaces, the cathedral of St Vitus, churches, gardens and lanes, 570 m long and 130 m wide, about 7 hectares, listed by Guinness as the largest ancient castle in the world by the area of its coherent buildings; the seat of Czech presidents.
• Windsor, England. 5.3 hectares, the largest inhabited castle in the world and the largest in England.
• Mehrangarh, Jodhpur, India (1459). A fort-palace on a cliff 120 m above the city, with walls 36 m high, one of the largest in India; the Red Fort in Delhi (1648) covers 100 hectares as a walled palace city and Chittorgarh 280 hectares as a fortified hill.
• Hohensalzburg, Austria (1077, enlarged to 1500). The largest fully preserved medieval castle in central Europe, 250 by 150 m on its hill.
• Spiš Castle, Slovakia (12th century). 4 hectares of ruin on a hill, among the largest medieval castle sites in Europe.
• Edinburgh Castle on its rock, Caerphilly (1268–71), the largest in Wales at 12 hectares with its water defences, Dover, the largest in England by area with its outer walls, and Carcassonne, a walled city rather than a castle, 3 km of double walls.
• Krak des Chevaliers, Syria (1142–1271). The Crusader castle of the Hospitallers, the finest medieval castle anywhere by common consent, 3 hectares of concentric walls that were never taken by assault; damaged in 2012–14.
• Himeji, Japan (1609). 83 buildings on 107 hectares of grounds, the largest castle in Japan, of white plaster over timber, never attacked.
• Buda, Wawel, the Kremlin, the Alhambra. Palace-fortresses of 27 to 13 hectares that are castles by the loose definition; the Moscow Kremlin's 27.5 hectares would make it the largest of all, and it is a citadel.

The oldest still lived in

Windsor since 1110; the Tower of London, which has a resident governor and the Yeoman Warders and their families, and a ravenmaster, since the 1080s; Alnwick in Northumberland, home of the Percys since 1309; Warwick, lived in until 1978; Berkeley in Gloucestershire, of 1153, the oldest castle in England lived in by the family that built it, the Berkeleys; Eilean Donan and Dunvegan in Scotland, Dunvegan the seat of the MacLeods since the 13th century, the oldest continuously inhabited castle in Scotland; Killyleagh in Ireland; Marksburg and Burg Eltz in Germany, Eltz owned by the same family for 33 generations since 1157; Château de Josselin in Brittany, the Rohans' since 1008; Castello di Amorosa, no, that is a winery in California of 2007. The kings and dukes who kept their castles as homes are why they survive: an inhabited castle has a roof.

By country: oldest and largest

• England. Oldest: the White Tower (1078); largest: Windsor (inhabited), Dover (by outer walls).
• Scotland. Oldest: Castle Sween in Argyll (about 1200) and Dunvegan; largest: Edinburgh.
• Wales. Oldest: Chepstow (1067), the oldest stone castle in Britain; largest: Caerphilly.
• Ireland. Oldest: Killyleagh (1180) and Carrickfergus (1177); largest: Trim (1176), 1.2 hectares.
• France. Oldest: Doué (950) and Langeais (994); largest: Vincennes, with its 52 m keep, or Carcassonne if counted; Chambord is a palace.
• Germany. Oldest: Cochem, Marksburg and Wartburg (1067); largest: Burghausen, 1 km long, the longest castle in the world; Hohenzollern and Neuschwanstein are 19th-century.
• Spain. Oldest: Burgos (884) and the Alcazaba of Mérida (835), the oldest Muslim fortress in Spain; largest: the Alhambra (13 hectares).
• Italy. Oldest: Castel dell'Ovo, Castello di Sarzanello; largest: Castel Sant'Angelo, a Roman tomb.
• Poland. Malbork, largest in the world; Wawel, the royal castle of Kraków since 1038.
• Czech Republic. Prague, Guinness's largest; Karlštejn (1348).
• Japan. Oldest keep: Inuyama (1537) or Maruoka (1576); largest: Himeji; Osaka, rebuilt in concrete.
• Middle East. Aleppo, oldest site; Krak des Chevaliers, finest; Kerak and Shobak in Jordan, Crusader.
• United States. Castillo de San Marcos (1672); the "castles" of the Gilded Age, Hearst, Biltmore, Boldt, are houses.

Versions and theories

• Aleppo is the oldest castle. The oldest fortified hill called a castle; its castle is of about 1200, younger than the White Tower. Doué is the oldest castle in the strict sense.
• Prague is the biggest. By Guinness's measure of coherent buildings; Malbork is three times its area within the walls, and the Red Fort, the Kremlin and Chittorgarh are larger by the loose definition. Every list picks its measure.
• Windsor is the oldest inhabited. Since 1110 by kings; the Tower of London has had residents since the 1080s but not as a royal home since the 1500s, and Dunvegan and Berkeley have families rather than crowns.
• The White Tower is the oldest building in London. The oldest above ground in use; the Roman wall and the Temple of Mithras are older and ruins, and All Hallows by the Tower has a Saxon arch of 675.
• Neuschwanstein is a medieval castle. It is a 19th-century palace of 1869–86 built to look like one; the story is in the castles article.
• Castles were built for defence. For defence, for living, for showing off and for governing; the biggest were capitals, and the oldest were homes.

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