The Leufsta Collections were built up by the De Geer family in the 18th century. The Leufsta Library consists of around 8,500 books on natural sciences and other subject areas. The Leufsta Sheet Music Collection contains publications and manuscripts from the mid-18th century. The majority of the sheet music comes from Holland. As for the Manuscript Collection, it contains mostly the entomologist Charles De Geer's own works and drafts, but also very precious manuscripts by Linnaeus or Olof Rudbeck (both the elder and the younger).