Home» Monastic Sites» Offaly» Croghan Monastery Croghan Monastery Offaly Early Irish 5th century Ruins About This Site Early monastic site, founded before 490/492 Historical Information Founded:before 490/492 Alternative Names: Cruachan Bri Eli Other Sites in Offaly Annaghbrack Glebe,Killoughy Holy Well Unlocated holy well near the church of Killoughy (Shaw Rev. 1971, 53-4). The above description is derived from the published… Learn More Ballaghanoher Holy Well Unlocated holy wells within the townland of Ballaghanoher that are described in the nineteenth century OS Letters (O’Flanagan 1927 vol.… Learn More Ballincur (Ballybrit By.),Castletown And Glinsk,Lismoney,The Walk Holy Well Unlocated holy well in the village of Kinnitty that was dedicated to St Finan (Feehan 1979, 95). The above description… Learn More Ballycollin (Eglish By.) Mass Rock Mass-rock in the townland of Ballycollin that is listed in the report ‘Offaly Heritage at Risk’ (Offaly Historical and Archaeological… Learn More