Inishowen

Inishowen was a peninsula in northern Donegal between Lough Foyle and Lough Swilly, and the homeland of the Meic Lochlainn. After their power collapsed in 1241, the Norman Earldom of Ulster moved in and built Greencastle.

After the Bruce invasion shattered the earldom, the Ó Dochartaigh gradually conquered Inishowen in the fourteenth century. Their rule ended in 1608 when Cahir O'Doherty burned Derry and his rising was defeated; the peninsula was then granted to Arthur Chichester.