Home» Monastic Sites» Derry» Coleraine Killowen Coleraine Killowen Derry About This Site founded 1248 Historical Information Alternative Names: DrumtarsyCill Eoghain - Owen's churchCill-Eogain - St John's Church Other Sites in Derry Aghadowey Monastery early monastic site; hospital of St Gowry 1603 Learn More Aghanloo Monastery early monastic site; under erenaghs until 16th century Learn More Agivey Monastery early monastic site; purportedly founded 7th century by St Guar of Aghadowey; Cistercian monks grange of Macosquin Learn More Ballymagrorty Monastery (Derry Diocese) early monastic site, founded 6th century by St Colmcille Learn More