Don't be fooled by the fact that Kensington Palace was built in 1605. The home of the Royal Family, including the Cambridges, the Palace is equipped with high-tech security that rivals that of a state-of-the-art home.

Apartment 1A, where Prince William, Kate Middleton, and their three children Prince George, Princess Charlotte, and Princess Louis live, has a panic room and secret tunnel to ensure the safety of the family. (Incidentally, the term "apartment" is a bit misleading: the Cambridges' home has 20 rooms, including five reception rooms, three master bedrooms, a dressing room, night and day nursing rooms, and staff quarters, according to the Mirror.) The house also has a top-secret panic room and a special escape tunnel to protect against biological weapons, the magazine reported.

"Kate and William's royal apartment at Kensington Palace has a panic room and escape tunnel with an air filtration system to protect against biological weapons," the Global Citizen reported via the Mirror.

While the panic room may be new information about Apartment 1A, the secret tunnel has been reported in the past. This is because William and his brother Prince Harry used this tunnel as a secret entrance when they were growing up in KP with their mother, Princess Diana.

And William and Kate are not the only royals with high-tech security equipment. Her Majesty the Queen has panic rooms in both Buckingham Palace and Windsor Castle, which are "surrounded by 18-inch thick, bulletproof, flame-resistant steel walls," say Global Citizen. Prince Charles and Camilla's Highgrove residence has a steel room the size of a shipping container that can be used in an emergency. And all royal panic rooms are designed so that the monarch and his three heirs can survive for at least a week, global citizens say.

"The royal panic rooms are designed to withstand poison gas, bombs, and terrorist attacks. They are equipped with secure communication facilities, beds, washing machines, and enough food and water to keep the royal family alive for at least a week."

The outlet also added that few people know exactly where each royal panic room is located, for obvious reasons.