Terrifying Details of Life in Royal Palaces That Will Stun You

Going In Circles

Concentric circles of defense were first invented as a way to, surprise, protect the castle. Looking at this castle from above, it's obvious how the double walls would be a help to those protecting the ones inside. Two walls mean two chances to stop the impending forces of doom!

The More You Know

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Agatha Christie said she came up with many of her book plots while sitting in her bathtub while eating apples.
A team of six women programmed the first digital computer.

Post originally appeared on Upbeat News.