Artis, short for Natura Artis Magistra (Latin for "Nature is the teacher of the arts"), is a zoo in the center of Amsterdam. It is the oldest zoo in the Netherlands and one of the oldest zoos of mainland Europe. Next to possessing a zoo, Artis 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. The zoo is a member of the Dutch Zoo Federation (NVD), the European Association of Zoos and Aquaria (EAZA), the International Species Information System (ISIS), and the World Association of Zoos and Aquariums (WAZA).