The website "Manuscriptorium: European Digital Library of Written Cultural Heritage" is a project for collecting and providing online access to historical resources European wide. It is basically a collective virtual library, gathering the holdings of numerous national and university libraries from Europe. Originally a project financed by the National Library of the Czech Republic, thanks to the ENRICH project it has now expanded to include 5 million digitised images. Historical book resources in this database include: manuscripts; incunabula; early printed books; maps; charters; and any other type of written document. A list of the contributing libraries can be consulted. Users are encouraged to make use of the free registration, which gives them access to the full range of research and editing tools from this website: creating virtual documents with images from the database with personal notes; or the translation tool for document descriptions. A PDF file with a guide to using Manuscriptorium is provided. The search can be easy or advanced, using document identification or document origin. The welcome screen also gives information for partner or new institutions. The site provides specific software tools and engines needed for uploading new documents, therefore creating a rather overwhelming main page. The website is available in several European languages, although the search interface is exclusively in English. Manuscriptorium is a crucial resource for anyone interested in history, cultural history and cultural heritage.