The Welsh collection is the Library’s main collection of Welsh and Welsh language books. It is also the core collection of the National Library of Wales.
The collection also includes publications in the other Celtic languages; and a special effort is made by the Library to collect every Welsh publication throughout the whole world.
In addition to the British materials that come under the Copyright Act, the Library buys any works of Welsh interest published outside Wales. Every effort is also made to collect Welsh miscellaneous materials that are not included in the main stream from commercial publishers. The Library has a custodial responsibility to safeguard these smaller publications as well as more substantial books.