The Laboratori de Natura (Nature Laboratory) is located in the Castell dels Tres Dragons building in Ciutadella Park, one of the Museum’s scientific sites. The Laboratory currently contains the zoology collections and will soon also house the geology collections, which are in the Museu Martorell at present. The facility, which is used for much of the Museum’s scientific research and for management of the content of the collections, also houses the services necessary to conserve, document and study this rich heritage. The Castell dels Tres Dragons, which was built by Lluís Domènech i Montaner as a café-restaurant for the 1888 Universal Exposition, is rich in architectural and artistic importance. Over the first third of the 20th century, the building was used for a variety of purposes, including activities revolving around the natural sciences, but it has since been devoted exclusively to zoology. The Castell dels Tres Dragons also houses a library specialising in these scientific fields. Note: the centre is temporarily closed to the general public for renovation and the adaptation of new areas to house the Museum collections and the Documentation Centre, except the Library and the scientific access to collections that are opened to public.