The 1,441 room Schönbrunn Palace, comparable in grandeur to Versailles, is one of the major tourist attractions in Vienna. The palace was built between 1696 and 1712 at the request of Emperor Leopold I and turned into the imperial summer palace by Maria Theresa. The Palace Park offers a lot of attractions, such as the Privy Garden, the oldest zoo in the world, a maze and labyrinth, and the Gloriette, a marble summerhouse, situated on top of a 60 meter (200 feet) high hill.