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Turns out Dover Castle has seen its own fair share of remarkable shut-ins in its 800+ year history. In 1216 the castle's defenders withstood a siege for nearly three months! ➡️ https://t.co/OQ3aUIJ9LB
🎨 Peter Dunn ® @HistoricEngland
How Dover became the key to England - the Siege of 1216 https://t.co/DvucpWHLff