The Exeter Book, also known as the Codex Exoniensis or Exeter Cathedral Library MS 3501, is a large codex of Old English poetry, believed to have been produced in the late tenth century AD. It is one of the four major manuscripts of Old English poetry, along with the Vercelli Book in Vercelli, Italy, the Nowell Codex in the British Library, and the Junius manuscript in the Bodleian Library in Oxford. The book was donated to what is now the Exeter Cathedral library by Leofric, the first bishop of Exeter, in 1072. It is believed originally to have contained 130 or 131 leaves, of which the first 7 or 8 have been replaced with other leaves; the original first 8 leaves are lost. The Exeter Book is the largest and perhaps oldest known manuscript of Old English literature, containing about a sixth of the Old English poetry that has come down to us. In 2016, UNESCO recognized the book as "the foundation volume of English literature, one of the world's principal cultural artefacts". History The Exeter Book is generally acknowledged to be one of the great works of the English Benedictine revival of the tenth century; the precise dates that it was written and compiled are unknown, although proposed dates range from 960 to 990. This period saw a rise in monastic activity and productivity under the renewed influence of Benedictine principles and standards. At the opening of the period, Dunstan's importance to the Church and to the English kingdom was established, culminating in his appointment to the Archbishopric at Canterbury under Edgar of England and leading to the monastic reformation by which this era was characterised. Dunstan died in 998, and by the period's close, England under Æthelred faced an increasingly determined Scandinavian incursion, to which it would eventually succumb. The Exeter Book's heritage becomes traceable from the death of Leofric, bishop of Exeter, in 1072. Among the possessions which he bequeathed in his will to the then-impoverished monastery at Exeter (the precursor to the later cathedral) is one famously described as i mycel Englisc boc be gehwilcum þingum on leoð-wisan geworht: "one large English book on various subjects, composed in verse form". This book has been widely identified by scholars as the Exeter Codex. Leofric's bequest, however, took place at least three generations after the book was written, and it has generally been assumed that it originated elsewhere.