Home» Monastic Sites» Tyrone» Omagh Monastery Omagh Monastery Tyrone Early Irish 8th Century Ruins About This Site Early monastic site, apparently founded by 792 (though may refer to Drumragh, supra) Historical Information Founded:792 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