collected since the library was founded. These archives contain many different types of document, such as charters, estate records, correspondence, literary drafts and digital materials, which range from the medieval to contemporary periods. Many of the earlier archives are those of the landed gentry and their estates, which developed over many centuries, but these are supplemented by corporate archives including the Church of Wales archive and the archive of the Court of Great Sessions that the Library has received. The Library collects corporate archives, which are the records of institutions, societies and public bodies, and the personal archives of individuals who have played a significant role in the life of the nation. Personal archives contain a variety of material that is related to the life and work of notable individuals and families. For example, the papers of Celtic scholar Sir Idris Foster include correspondence, personal papers, scholarly and academic notes, and papers relating to organisations and societies, such as the Honourable Society of Cymmrodorion, the University of Wales and the Church in Wales. The Welsh Political Archive All materials concerning politics in Wales are kept in the Welsh Political Archive that the National Library established in 1983. This archive coordinates the collection of manuscript, printed and audiovisual records relating to the major political parties active in Wales, with the largest party archive being Plaid Cymru, and notable politicians including Lloyd George. The records of organisations including the Welsh National Council of the United Nations Association and the Association of Welsh Local Authorities also to be found in this archive, as are papers generated by the Parliament for Wales Campaign 1953–6, and several nationalist pressure groups. Some of the political archives cannot be accessed due to their embargo status. Modern Literary Archives The Modern Literary Archives are home to the work of some of the most important Welsh poets and authors. An insight into the creation of prose and poetry is provided by the letters, manuscript and typescript drafts, notebooks, proofs and other personal papers of 20th and 21st century writers. Archives belonging to Welsh-language authors, Welsh authors writing in English and literary organisations are deposited in the National Library. Papers and manuscripts belonging to Welsh authors who achieved their fame during the 20th century have been collected by the Library. The Archives of Welsh Authors include the work of authors, poets, playwrights, scholars, journalists and archdruids of the Gorsedd. Significant