Derg Castle

Derg Castle, located on the north bank of the River Derg at Castlederg in Tyrone, is a post-medieval fortification with roots extending back to the late medieval period. The site first appears in historical records in 1497, when the Annals of Ulster document an O'Donnell castle at the location being attacked and captured by the O'Neills. This initial structure was likely constructed as a square...