The last High King, one mile north
Brian Boru and Béal Ború
Béal Ború — Brian Boru's Fort — stands on a spur of land north of the town where the lake narrows to a crossing point. Brian was born near here around 941 and used Killaloe as his capital from 1002, ruling from Kincora, his palace above the Shannon. He was killed at the Battle of Clontarf in 1014 on the day his army defeated the Vikings — the only major battle he died winning. The fort is an earthwork, not a ruin with walls. It's still worth the walk. What's left is the shape of power.
One stone, two scripts, one converted Viking
Thorgrim's Stone
Found in 1916 in the cathedral wall, Thorgrim's Stone carries two inscriptions for the same short message. The runic face reads: 'Thorgrim erected this cross.' The ogham face reads: 'A blessing on Thorgrim.' It's the only known stone in Ireland with both scripts, and the only known runic Irish Christian monument. Whoever Thorgrim was — a Norse settler, a convert, a man who wanted his name remembered in both worlds — he succeeded. The stone is in the south porch of St Flannan's Cathedral.
Twice built, still standing
St Flannan's Cathedral
The first Romanesque cathedral went up in the 1180s under Donal Mór O'Brien. It lasted about five years before Cathal Carrach of Connaught destroyed it in a revenge attack in 1185. The current building dates from roughly 1200–1225 — the shift between Romanesque and Gothic visible in its own stonework. One Romanesque arch survived the second build and is still there. The cathedral is Church of Ireland; access is generally open and free.
Clare on one side, Tipperary on the other
The bridge towns
Killaloe and Ballina have been functionally the same town for centuries, separated only by the Shannon and a county boundary. The 18th-century stone bridge between them closed to vehicles in late 2025 when a new Brian Boru Bridge opened upstream. The old bridge is now for pedestrians. Cross it to switch counties, switch pub prices, and switch the direction of the view.