Fenagh, Co Leitrim

Fenagh Abbey is one of the oldest monastic sites in Ireland, believed to date back to the earliest period of Celtic monasticism. The founder was St. Caillín, thought to have arrived in Fenagh from Dunmore in County Galway in the 5th century (according to the Book of Fenagh). The Abbey had a monastic school, and was "celebrated for its divinity school, which was resorted to by students from every part of Europe".

The area was the site of the battle of Fidhnacha in 1094.