The Sarum Antiphoner

Church of St Helen, Ranworth, Norfolk.
This Manuscript was illuminated by the monks of Langley Abbey in 1400.  It was lost for 300 years before being found in a private art collection. This page is part of the order of service for the feast of Corpus Christi.
The book was written on sheepskin, 285 pages.
Picture: 'Treasures of Britain', AA, Drive Publications, 1968, page 404.