Book of Fenagh

The Book of Fenagh (Irish: Leabar Fidhnacha) is a manuscript of prose and poetry written in Classical Irish by Muirgheas mac Pháidín Ó Maolconaire in the monastery at Fenagh, West Breifne (modern-day County Leitrim). It was commissioned by Tadhg Ó Rodaighe, the coarb of the monastery, and is believed to derive from the "old Book of Caillín" (Irish: Leabar Chaillín), a lost work about Caillín, founder of the monastery. Ó Maolconaire began work about 1516.