Book of Leinster
| Book of Leinster | |
|---|---|
| Dublin, TCD, MS 1339 (olim MS H 2.18) | |
f. 53 | |
| Also known as | Lebor Laignech (Modern Irish Leabhar Laighneach); Lebor na Nuachongbála |
| Type | Miscellany |
| Date | 12th century, second half |
| Place of origin | Terryglass (County Tipperary) and possibly Oughaval or Clonenagh (County Laois) |
| Language(s) | Old Irish, Middle Irish |
| Scribe(s) | Áed Ua Crimthainn |
| Size | c. 13″ × 9″; 187 leaves |
| Condition | 45 leaves lost, according to manuscript note. |
| Previously kept | By the Ó Mhorda and Sir James Ware |
The Book of Leinster (Middle Irish: Lebor Laignech Middle Irish pronunciation: [ˈl͈ʲevər ˈlaɣʲnʲəx], LL) is a medieval Irish manuscript compiled c. 1160 and now kept in Trinity College Dublin. It was formerly known as the Lebor na Nuachongbála ("Book of Nuachongbáil"), a monastic site known today as Oughaval.
In 2023, Trinity College started an extensive restoration project to make the manuscript available for public viewing.
Fragments of the book, such as the Martyrology of Tallaght, are in the collection of University College Dublin.