The natural history museum is the visible part of the Royal Belgian Institute of Natural Sciences and its 160 researchers. It has 16 000 m² of permanent galleries, temporary exhibition rooms welcoming 2 exhibitions per year (a large one of about 700m² and a small one of 100m²) and educational workshops, enabling it to welcome its 340 000 visitors each year, approximately 30 % of whom are school groups. Its Dinosaur Gallery is world famous, it being the largest in Europe.