Hermitage Museum

The famous Hermitage Museum keeps 74 cats to keep its basements mice-free.

The State Hermitage Museum in the Russian city of Saint Petersburg is one of the oldest and largest museums in the world.

It was founded in 1754 by the Queen Catherine the Great, and houses a gigantic collection of over three million items. The museum has been continuously open to the public since 1852, and visitors from all over the world can enjoy the part of the collection which is on permanent display.