Carbury Castle’s Betrayal
Archived: 24 October 2026
In 1305, Ireland experienced interconnected local conflicts amid divided Gaelic and Anglo-Irish lordships. Piers de Bermingham treacherously killed Muirchertach Ó Conchobair Fhailghe, his brother and leading followers at Carbury Castle, exposing fragility of frontier agreements. Áed Ó Conchobair’s forces defeated Muintir Raighilligh, causing heavy losses, while warfare and killings disturbed Leinster, Desmond and Breifne. Annals also noted early-summer hardship, without specifying its cause. Richard de Burgh built Northburgh Castle on Lough Foyle, strengthening Ulster influence. Meanwhile, royal administration continued through payments, legal inquiries and ecclesiastical property regulation, illustrating Ireland’s patchwork of competing powers across towns, lordships, churches, and royal jurisdictions.