Donegal Abbey, also known as Donegal Franciscan Friary, was founded in 1474 by the O’Donnell rulers of Tír Chonaill, one of the most powerful Gaelic lordships in Ireland. Situated beside Donegal Bay, the friary became an important religious foundation in the northwest, reflecting the close relationship between Gaelic noble families and the Franciscan order during the later Middle Ages.

The friary developed into a centre of prayer, learning, and scholarship. Its church and domestic buildings served a community of Franciscan friars whose influence extended into the surrounding region. The O’Donnells supported the foundation, and their patronage helped establish it as a significant religious and cultural centre in Gaelic Ireland.

Donegal Abbey is particularly remembered for its connection to the Annals of the Four Masters. In the seventeenth century, a team of scholars led by Mícheál Ó Cléirigh, a Franciscan friar, compiled this monumental chronicle of Irish history. Work began in 1632, drawing on earlier annals and historical sources to preserve accounts of Ireland’s kings, saints, battles, and traditions. The project was associated with the Donegal Franciscan community and became one of the most important achievements in the preservation of Ireland’s written heritage.

The friary suffered during the upheavals of the sixteenth and seventeenth centuries and eventually fell into ruin. Its surviving walls and architectural remains still stand near the River Eske and Donegal Bay. Though much of the original complex has disappeared, Donegal Abbey remains a powerful reminder of the role religious communities played in safeguarding Ireland’s historical memory and cultural inheritance.