most frequently used collection of maps and one of the most consulted categories of documents in the Library. The Cynefin Project is digitising over 1100 tithe maps and transcribing the appointment documents to link them together. The project is planned for completion in September 2016. Other holdings in the maps collection include: manuscript estate maps, enclosure maps, estate sale catalogues, railway plans, architectural drawings, mining plans, and nautical and aeronautical charts. Publications The National Library of Wales has published a series of books about its history and collections, including manuscript catalogues, a bibliography of Welsh publications, Parish Registers of Wales, and academic studies of Gwen John, Kyffin Williams and others. The Library also publishes the National Library of Wales Journal. Between 1909 and 1984, the Library published Bibliotheca Celtica in fulfilment of the terms of its charter to keep a register of books printed in Welsh and other Celtic languages or relating to Wales and the Celtic nations. In 1985 Bibliotheca Celtica was merged with the Subject Index to Welsh Periodicals to form A Bibliography of Wales (Llyfryddiaeth Cymru). In 1987, the retrospective bibliography Libri Walliae: a catalogue of Welsh books and books printed in Wales 1546–1820 was published. Digital content Many of the most important manuscripts and books at the Library have been digitised and made freely available to view on the library's website in its "Digital Mirror". In April 2012, the Library made a policy decision not to claim ownership of copyright in digital reproductions. This meant that the rights information attached to digital representations of works would reflect the copyright status of the original (i.e., that originals in the public domain would remain in the public domain in their digital form). The Library has applied this policy to projects delivered since then (the Welsh Journals Online and Cymru1914) and is still in the process of updating rights information for its pre-2012 projects. Metadata are released into the public domain using the CC0 licence. The Library has experience of sharing content from its collections under open content licences on platforms such as Wikipedia (e.g., the John Thomas photographic collection) and Flickr. In February 2013, the Library contributed 50 images relating to Monmouthshire to Wikipedia, a successful pilot project with Wikimedia UK. The following month, they became one of the cultural heritage organisations that partnered with Wikimedia Nederland, Wikimedia UK and Wikimedia France, together with Europeana, to be part