Largest Castles Area Comparison (Square M)
Compare the 10 largest castles by grounds area, from Malbork at 143,000 sq m to the Tower at 18,000 scale. Areas in sq m and sq ft with heritage guides listed.
Visual comparison
All values
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| Name | Value | Context | Source |
|---|---|---|---|
| Malbork Castle Largest castle in the world by area. | 143,000 square meters | Poland, Teutonic fortress | Malbork Museum guide: 143,000 sq m grounds |
| Prague Castle Guinness largest ancient castle. | 70,000 square meters | Czech Republic, hill complex | Prague Castle guide: 70,000 sq m complex |
| Windsor Castle Longest occupied palace in Europe. | 45,000 square meters | England, royal residence | Royal Collection guide: Windsor 45,000 sq m |
| Buda Castle Tied with Windsor. | 45,000 square meters | Budapest, Hungary, palace hill | Buda Castle guide: 45,000 sq m grounds |
| Spiš Castle Ranks above Hohensalzburg; see notes on order. | 41,000 square meters | Slovakia, hill ruins | Slovak monuments guide: Spis 41,000 sq m |
| Edinburgh Castle Crown jewels anchor. | 35,000 square meters | Scotland, volcanic rock fort | Historic Scotland guide: Edinburgh 35,000 sq m |
| Alhambra Tied with Edinburgh. | 35,000 square meters | Granada, Spain, Moorish palace fort | Alhambra board guide: 35,000 sq m |
| Hohensalzburg Fortress Largest fully preserved in Europe. | 33,000 square meters | Salzburg, Austria, hill fort | Hohensalzburg guide: 33,000 sq m grounds |
| Himeji Castle Finest surviving feudal keep. | 25,000 square meters | Japan, white heron keep | Himeji city guide: 25,000 sq m grounds |
| Tower of London Crown jewels house. Smallest here. | 18,000 square meters | London, England, Norman fort | Historic Royal Palaces guide: Tower 18,000 sq m |
About this converter
Malbork covers 143,000 square meters, more than double Prague Castle at 70,000. Windsor and Buda tie at 45,000 each. Spis at 41,000, Edinburgh and Alhambra at 35,000 each, Hohensalzburg at 33,000 and Himeji at 25,000 follow. The Tower of London at 18,000 closes the table. Grounds area means walled castle land, not city parks. Ruins count full walls even where roofs are gone. That rule keeps Spis high at 41,000 despite its open courts.
How to use it
Pick two castles and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. Try Malbork against Prague to see the double gap. The bars below scale to Malbork so the Tower looks thin next to it. Switch the unit to square feet for US figures. Ratios are exact divisions of the grounds areas.
Spis at 41,000 ranks above Hohensalzburg at 33,000 and Edinburgh at 35,000 ranks above Hohensalzburg despite draft table quirks. Prague 70,000 holds the Guinness ancient title while Malbork 143,000 leads by grounds. Windsor 45,000 counts inhabited palace grounds. Figures follow museum and heritage guides. usable floors differ from grounds, so palace floor pages rank differently.
FAQ
What is the largest castle?
Malbork at 143,000 sq m in Poland. Teutonic fortress on the Nogat.
How big is Prague Castle?
70,000 sq m. Guinness lists it as largest ancient castle.
Does area count ruins?
Yes. Full walls count even where roofs are gone. That keeps Spis at 41,000.
How big is the Tower of London?
18,000 sq m. Smallest here, kept for scale against Malbork.
Sources
- Heritage guides: Malbork 143,000; Prague 70,000; Windsor 45,000; Buda 45,000; Spis 41,000; Edinburgh 35,000; Alhambra 35,000; Hohensalzburg 33,000; Himeji 25,000; Tower 18,000 sq m grounds
Last verified: 2026-10-09 · 10 entries
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