Home» Monastic Sites» Tyrone» Trillick Monastery Trillick Monastery Tyrone Early Irish 7th Century Ruins About This Site Early monastic site, purportedly founded by 613 Historical Information Founded:613 Alternative Names: Trelec-morTrelick Other Sites in Tyrone Ardboe High Cross High Cross located in Tyrone. Learn More Ardboe Monastery Early monastic site, founded late 6th century; burned 1166; destroyed by John de Courcey in 1198 Learn More Ardstraw Monastery Early monastic site, founded by St Eugene; diocesan cathedral c.581; see transferred to Maghera c.1152; erenaghs until early 17th century Learn More Ardtrea Monastery Early monastic site, nuns founded 5th century by St Trea Learn More