Gallen Abbey
Gallen Abbey, also known as Gallen Priory, is a medieval monastery and National Monument in County Offaly, Ireland. It sits on the south bank of the Brosna river, about 1 kilometer south of Ferbane.
The abbey was founded around AD 492 by Saint Canoc, son of Saint Brecan. It was damaged in the 820s during a Munster king’s invasion. Welsh monks later restored it and turned it into a successful school. In 949 another Munster king attacked the site, nearly destroying it; the stone church on the grounds was ruined, and the oldest surviving building at the site dates to the 11th century. Grave slabs from the 8th–11th centuries, some with interlacing or wheel crosses, mark the abbey today.
In the 12th century, church reforms linked the Irish church more closely with the Catholic Church and the Rule of St Augustine, gradually replacing Celtic practices. The Mac Coughlan family rose to power in the area and often served as both rulers and priors, a pattern that continued into the 18th century.
During the Plantations of Laois and Offaly (from 1556), local resistance slowed English settlement for about 50 years. In 1571 George Bouchyer was promised the lands around the abbey, and in 1612 Sir Gerard Moore finally received them for rent. The lands included the church, a cemetery, cottages, gardens, farmland, pastures, and forests. The Armstrongs, a Scottish family, were the last owners. In 1841 Andrew Armstrong became a baronet, and his descendant Sir Andrew Harvey Armstrong sold the property to the Sisters of Saint Joseph of Cluny in 1923. Today, Gallen Abbey is publicly accessible as a National Monument.
This page was last edited on 3 February 2026, at 14:57 (CET).