The Oughterlin Mass Rock is located in County Donegal, situated past Oughterlin Chapel on the road to Kerrykeel. The altar consists of local stone constructed in an arch formation around a cross with an inscription. This inscription documents the site’s use for Mass celebrations during the Penal period. The rock, known in Irish as “Carraig an Aifrinn,” is accessible from the left side of the road when traveling toward Kerrykeel.

Historical Context

Between 1695 and 1756, Catholic bishops faced banishment from Ireland, while priests were required to register under the 1704 Registration Act. The Archaeological Survey Database of the National Monuments Service classifies Mass Rocks as rocks or earthfast boulders used as altars during the 1690s to 1750s, with some examples dating to the 1650s.

Current Usage

The Mass Rock continues to serve as a place of devotion. Local residents utilize the site for prayer intentions, leaving holy water, religious pictures, and other devotional items at the altar.

Archaeological Significance

The Oughterlin Mass Rock provides physical evidence of religious practices during the Penal Laws period. The constructed stone arch and carved cross with inscription demonstrate deliberate architectural elements in its design. The site forms part of Ireland’s archaeological record, alongside other Mass Rocks that have been systematically documented by the Archaeological Survey of Ireland.

Modern Documentation

Mass Rocks across Ireland continue to be studied as part of ongoing research into religious practices during the Penal period. These sites are recorded within the Archaeological Survey Database of the National Monuments Service, contributing to the documentation of historical religious practices in Ireland.