Some titles in the libraries of the Natural History Museum Vienna are part of collections dating from the 18th century, at the time of the Habsburgs. Of the current 200.000 volumes, 50.000 pre-date the year 1900.
Acquisition of new works and collections is geared to the focal areas of the scientific departments.
Opening hours vary between the libraries. Please ask the librarian in charge for information on opening hours and locations within the museum.