Which country has the largest ancient castle?

Prague Castle- Largest Ancient Castle This UNESCO World Heritage Site was built in 880 AD by the Czech Monarchs. It has been declared the largest ancient castle complex in the world by the Guinness Book of World Records. Currently, it serves as an official building for the Heads of the State.



The Czech Republic holds the record for the largest ancient castle in the world: Prague Castle (Pražský hrad). According to the Guinness Book of Records, this massive complex spans nearly 70,000 square meters (750,000 square feet) and dates back to the 9th century. It is a stunning architectural "encyclopedia," featuring styles from Gothic and Romanesque to Baroque and Mannerist. Unlike a single fortified tower, Prague Castle is a sprawling district of palaces, churches, gardens, and administrative buildings, including the magnificent St. Vitus Cathedral. In 2026, it remains the official residence and workplace of the President of the Czech Republic. While the Citadel of Aleppo in Syria and Windsor Castle in the UK are also gargantuan, Prague Castle’s sheer footprint and its 570-meter length solidify its title as the largest ancient castle complex still in use today.

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The Most Beautiful Palaces in the World
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  • Mysore Palace, India.
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