Cathal Crobhdearg Ua Conchobair, the King of Connacht and youngest son of the Irish High King Tairrdelbach mac Ruaidri Ua Conchobair, dies on May 27, 1224. This finally opens the way for the Norman occupation of Connacht.

Ua Conchobair is born in 1153 and serves as King of Connacht from 1189 to 1199, and is re-inaugurated on the stone at Clonalis about 1201, reigning until 1224. He first succeeds his elder half brother Ruaidri‘s son Conchobar Máenmaige Ua Conchobair as ruler of Connacht. Conchobar Máenmaige’s son Cathal Carrach Ua Conchobair then rules from 1199 to 1202, with Cathal Crobhdearg back in power from then.

From his base west of the River Shannon he is forced to deal with the Norman invaders. He is a competent leader despite problems, avoiding major conflicts and winning minor skirmishes. Ua Conchobair attempts to make the best of the new situation with Ireland divided between Norman and Gaelic rulers. His long reign is perhaps a sign of relative success. He is the subject, as Cáhal Mór of the Wine Red Hand, of the poem A Vision of Connaught in the Thirteenth Century by the 19th-century Irish nationalist James Clarence Mangan.

Ua Conchobair founds Ballintubber Abbey in 1216, and is succeeded by his son, Aedh Ua Conchobair. His wife, Mor Ní Briain, is a daughter of King Domnall Mór Ua Briain of Thomond, dies in 1218.

In 1224 Ua Conchobair writes to Henry III as Lord of Ireland, asking that his son and heir Od (Aedh) be granted all of Connacht, in particular those parts, Kingdom of Breifne, owned by William Gorm de Lacy.

An account of Ua Conchobair’s inauguration has been preserved, written down by Donogh Bacach Ó Maolconaire, the son of O’Connor’s very inaugurator Tanaide Ó Maolconaire, who is also his historian.

(Pictured: Ruins of the 12th century Cistercian Knockmoy Abbey which contains the burial site of King Cathal Crobhdearg Ua Conchobair)