Aughnanure Castle

Aughnanure Castle stands on a rocky promontory on the eastern shore of Lough Corrib, near the village of Oughterard in County Galway. The promontory juts into the River Drimneen at the point where it leaves Lough Corrib, providing natural water-channel defence on two sides and a lake view that stretches westward toward the Connemara mountains. The castle was built c.1490 by the O'Flaherty clan — the lords of Iar-Connacht (West Connacht) and one of the most powerful Gaelic lordships in late medieval Ireland.

The O'Flaherty clan's reputation preceded them in ways that were not entirely meant as compliments. The inscription above the western gate of Galway city — 'From the ferocious O'Flaherties, good Lord deliver us' — captures the attitude of the Norman-Irish merchant oligarchy of Galway toward their Gaelic neighbours who controlled the territory surrounding the town. The O'Flaherties' response was to consolidate their lordship of Iar-Connacht from exactly this kind of fortified position: a tower house on Lough Corrib, controlling the lake's eastern approaches, with the resources of the Connemara coastal territory behind them.

The castle as it stands consists of a six-storey central tower house — the residential and defensive core — enclosed by a bawn (defended courtyard) with a second inner courtyard containing the remains of a great hall. The tower house's top floors are in reasonable condition, with intact battlements and the internal floor structure largely survives to mid-height; the great hall is ruined, with only the walls standing. The bawn wall completes the enclosure, with the lake and river channel providing the outer defence on two sides.

The tower house's most discussed architectural feature is the trapdoor in the great hall floor — a pit below a hinged wooden hatch in the reception room's floor, interpreted in local tradition as a mechanism for disposing of guests whom the O'Flaherties wished to remove from a banquet without the social awkwardness of a visible confrontation. The pragmatic alternative explanations (escape route, storage pit, garderobe) are more probable but less entertaining, and guides at the castle do not generally discourage the more dramatic interpretation. Whatever its function, the trapdoor is the first thing most visitors ask about and the last thing most guides mention.

The castle's political history reflects the pressure that the Tudor administration in Ireland exerted on Gaelic Connacht from the mid-16th century. The Presidency of Connacht, established in 1569, was the institutional mechanism through which the English Crown attempted to replace the Gaelic lordship system with direct royal administration, and the O'Flaherties were among the primary targets of this policy. Aughnanure was captured by Crown forces in 1572, but the O'Flaherties' connection with the castle persisted: when the 1641 rebellion broke out across Ireland — a coordinated uprising of Gaelic and Catholic interests against the Protestant planter establishment — the castle was retaken by the clan 'by stealth,' a phrase in the historical record that generally indicates a military operation whose details were recorded by the losing side with some economy.

The castle's final military role came during the Cromwellian siege of Galway (1651–1652), when it was used as a supply base for the besieged garrison of the town. Galway was the last major Irish Confederate stronghold to fall; after its surrender in 1652, the Cromwellian land settlement redistributed most of Connacht's Gaelic property to English Protestant settlers or soldiers.

The Office of Public Works restored the castle in the 1960s and maintains it as one of the few surviving O'Flaherty clan tower houses in its original location. The visit is an hour at moderate pace: the tower house interior, the bawn, the hall ruins, and the view over Lough Corrib from the promontory. The GYG Connemara Castles Tour from Galway (t388567) combines Aughnanure with [Kylemore Abbey](/castles/ireland/kylemore-abbey) and [Ballynahinch Castle](/castles/ireland/ballynahinch-castle) in a full day — a circuit that covers three completely different castle types (Gaelic tower house, Victorian romantic mansion, 18th-century hotel estate) in one Connemara day.