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)
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

Terryglass

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Location of Terryglass (Tír Dhá Ghlas) in Ireland

The Book of Leinster (Middle Irish: Lebor Laignech [ˈl͈ʲevər ˈlaɣʲnʲəx], LL) is a medieval Irish manuscript compiled c. 1160 and now kept in Trinity College Dublin, under the shelfmark MS H 2.18 (cat. 1339). It was formerly known as the Lebor na Nuachongbála "Book of Nuachongbáil", a monastic site known today as Oughaval.

Some fragments of the book, such as the Martyrology of Tallaght, are now in the collection of University College Dublin.^[1]