Inside Kate Middleton and Prince William’s home with panic room and secret tunnel

ok.co.uk:

Kensington Palace might have been built in 1605, but that's not to say it isn't also an extremely high-tech home fit to protect the Royal Family.

The historical building is equipped with a multitude of security features in order to keep Prince William, Kate Middleton, both 40, and their three children George, eight, Charlotte, seven, and Louis, four away from harm.The Cambridges' home in particular, Apartment 1A, includes a panic room and a secret tunnel...

so you can probably guess that the apartment is most likely quite a bit larger than your average flat. After all, it does have the word 'palace' in the name.

Their particular apartment reportedly features five reception rooms, three main bedrooms, dressing rooms, a night and day nursery, and staff quarters, according to the Mirror.