Home» Monastic Sites» Derry» Ballynascreen Monastery Ballynascreen Monastery Derry founded 6th century About This Site early monastic site, founded 6th century by St Colmcille Historical Information Alternative Names: Scrin-coluim-cille 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