Brian Ború's Killaloe: Kincora, Béal Ború and the cathedral

For about a decade at the start of the eleventh century the most powerful man in Ireland ruled from this river crossing. Brian Ború was High King from 1002 until his death at the Battle of Clontarf in 1014, and Discover Ireland gives his headquarters as Kincora, in what is now the town of Killaloe. Nothing of Kincora survives above ground. What does survive is a set of places within a few kilometres of the bridge that make sense once you know why a king wanted to sit here, and you can see them all in a day.

Why here

Killaloe sits where Lough Derg narrows back into the Shannon. Discover Ireland describes Béal Ború as commanding the point where the lake narrows into the river, and Killaloe River Cruises says on its boat-trip page that the cruise heads north towards where Brian Ború kept watch over the river crossing at Béal Ború. Take the cruise first and the rest of the day falls into place.

Béal Ború

About 1.5km north of the bridge on the Clare side, between the R463 and the water, is a big earthen ringfort on a spur. Discover Ireland says it has long been identified as the ancient seat of Brian Ború, and credits the folklorist Dáithí Ó hÓgáin with the view that Brian was born or reared here; the name Béal Bóramha is given as the port of the cattle tribute, the tribute that gave Brian his name. Be ready for a grassy bank ringed with trees and no interpretation centre. Stand on the rampart, look at the lake narrowing below you, and the reason for the place is obvious.

Kincora and the hilltop

Kincora, Ceann Cora, was in the town. Local tradition puts it on the high ground at the top of Killaloe, around St Flannan's Catholic church; there is nothing to excavate by eye, so go up for St Molua's Oratory instead. The oratory is the church of the saint who gave Killaloe its name, Cill Dalua. St Flannan's Cathedral's own history says it stood on Friar's Island in the Shannon until the island was submerged in the 1930s for the Ardnacrusha power station, and that the building was moved up to the grounds of the Catholic church, where it stands now.

The cathedral and Brian's descendants

Walk back down to St Flannan's Cathedral on Royal Parade. The cathedral says Donal Mór O'Brien, who also founded St Mary's Cathedral in Limerick, built a church here early in the twelfth century, and that the present building replaced it between 1195 and 1225, dedicated to St Flannan, whom it describes as an eighth-century ancestor of Donal Mór. Three things to find:

• The Romanesque doorway in the south wall, which the cathedral says may come from Donal Mór's earlier church and carries over 130 patterns of plants and animals, no two alike. The two grave slabs at its base are reputed to mark Muircheartach O'Brien, King of Munster, who died while on pilgrimage to Killaloe in 1119.
• The Thorgrim stone, found in 1916 and dated by the cathedral to about 1000 AD, around the time Brian came to power. It carries both ogham and Norse runes; the runes read "Thorgrimr carved this cross". The cathedral suggests it may have been carved by a Viking converted to Christianity.
• St Flannan's Oratory in the graveyard, a small stone-roofed church older than the cathedral.

The cathedral says it is open daily from 10am to 7pm, with a service on Sundays at 11.30.

The Graves of the Leinstermen

Across the bridge and up the Arra Mountains in Co. Tipperary, on the western slope of Tountinna, a single standing stone looks down over the lake. Waterways Ireland repeats the legend that the stones are the graves of soldiers slaughtered in Brian Ború's time, while noting that their real age is unknown. The whole foot of Lough Derg is below you, and you can drive up from Ballina or walk the Lough Derg Way from the bridge, 8.7km on the mapped route and uphill most of the way.

Holy Island

If you have a second day, go north to Mountshannon and take Gerard Madden's boat to Inis Cealtra. His site says Brian's brother Marcán was abbot there in the tenth century and that Brian is said to have built one of the churches. Boats run daily, weather permitting, from April to the end of September.

The festival

The twin towns hold Féile Brian Ború every summer. The 2026 edition, the 33rd, ran from 1 to 5 July across Killaloe and Ballina. Dates for 2027 are on the festival's own website when announced.

A note on Tuamgraney: the cathedral parish points out that Tuamgraney, up the lake shore, has its own claim on Brian, and the Holy Island eBike tour from Killaloe passes through it.