Artis, short for Natura Artis Magistra (Latin for "Nature is the teacher of art and science"), is a zoo in the centre of Amsterdam. It is the oldest zoo in the Netherlands and one of the oldest zoos of mainland Europe. Artis Royal Zoo is not just a zoo, it also contains an aquarium and a planetarium. Artis also has an arboretum and a fairly large art collection. A part of the art collection is on display in the Aquarium building of the zoo. Artis contains 27 monumental buildings, most of which are used as enclosures for the animals, making Artis a unique cultural heritage of the 19th century.