The late Queen is captured here on the estate with Prince Philip in 1972, in the year of their silver wedding anniversary.

“It’s the most beautiful place on Earth. I think Granny is most happy there,” her granddaughter Princess Eugenie said, speaking on the ITV programme Our Queen at Ninety.

Now that the castle has opened to visitors, the public can enjoy the beloved royal residence, too. With this precedent of popularity now firmly in place, we can't wait to see which of the King's many homes will be the next to open its doors...

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Take a tour the British Royal Family’s favourite castle