Biblioteche e Wikimedia: strategie comuni per l'accesso aperto alla conoscenza e la costruzione collaborativa del sapere libero.

The paper presents an overview of the different forms of collaboration between the libraries and the world of Wikimedia. The article shows the many points of convergence between the librarians and the wikimedians. It describes the Wikipedia Library, the campaign #1Lib1Ref, the Libraries Project of Wikimedia Italia, the activities carried out in this area by BNCF and other Italian libraries. With regard to the reuse of bibliographic data, the contribution focuses on Wikidata and on WikiBib and WikiCite projects. The article finally explains the role of wikipedians in residence and describes the digital collections uploaded to Wikimedia Commons. [ABSTRACT FROM AUTHOR]