page_title: Monarchy of Ireland
section_title: Ruaidhrí, King of Ireland
hierarchical_section_title: Monarchy of Ireland / Gaelic kingdoms / Ard Rí co febressa: High Kings with opposition / Ruaidhrí, King of Ireland
caption_attribution_description: English: Stone carving of Rory O'Connor from a doorway in the grounds of Cong Abbey
context_page_description: A monarchical system of government existed in Ireland from ancient times until—for what became the Republic of Ireland—the early twentieth century. Northern Ireland, as part of the United Kingdom, remains under a monarchical system of government. The Gaelic kingdoms of Ireland ended with the Norman invasion of Ireland, when the kingdom became a fief of the Holy See under the Lordship of the King of England. This lasted until the Parliament of Ireland conferred the crown of Ireland upon King Henry VIII of England during the English Reformation. The monarch of England held the crowns of England and Ireland in a personal union. The Union of the Crowns in 1603 expanded the personal union to include Scotland. The personal union between England and Scotland became a political union with the enactments of the Acts of Union 1707, which created the Kingdom of Great Britain. The crowns of Great Britain and Ireland remained in personal union until it was ended by the Acts of Union 1800, which united Ireland and Great Britain into the United Kingdom of Great Britain and Ireland from January 1801 until December 1922.
context_section_description: Upon the death of Muirchertach Mac Lochlainn in early 1166, Ruaidhrí, King of Connacht, proceeded to Dublin where he was inaugurated King of Ireland without opposition. He was arguably the first undisputed full king of Ireland. He was also the last Gaelic one, as the events of the Norman invasion of 1169–1171 brought about the destruction of the high-kingship, and the direct involvement of the Kings of England in Irish politics.
  One of Ruaidrí's first acts as king was the subduing of Leinster, which resulted in the exile of its king, Diarmait Mac Murchada. Ruaidrí then obtained terms and hostages from all the notable kings and lords. He then celebrated the Oneach Tailtann, a recognised prerogative of the High Kings, and made a number of notable charitable gifts and donations. However, his caput remained in his home territory in central Connacht (County Galway). Ireland's recognised capital, Dublin, was ruled by Ascall mac Ragnaill, who had submitted to Ruaidri.
  Only with the arrival of MacMurrough's Anglo-Norman allies in May 1169 did Ruaidrí's position begin to weaken. A series of disastrous defeats and ill-judged treaties lost him much of Leinster, and encouraged uprisings by rebel lords. By the time of the arrival of Henry II in 1171, Ruaidrí's position as king of Ireland was increasingly untenable.
  Ruaidrí at first remained aloof from engagement with King Henry, though many of the lesser kings and lords welcomed his arrival as they wished to see him curb the territorial gains made by his vassals. Through the intercession of Lorcán Ua Tuathail (Laurence O'Toole), the Archbishop of Dublin, Ruaidrí and Henry came to terms with the Treaty of Windsor in 1175. Ruaidrí agreed to recognise Henry as his lord; in return, Ruaidrí was allowed to keep all Ireland as his personal kingdom outside the petty kingdoms of Laigin (Leinster) and Mide as well as the city of Waterford.
  Henry was unwilling or unable to enforce the terms of the treaty on his barons in Ireland, who continued to gain territory in Ireland. A low point came in 1177 with a successful raid into the heart of Connacht by a party of Anglo-Normans, led by one of Ruaidrí's sons, Prince Muirchertach. They were expelled, Ruaidhrí ordering the blinding of Muirchertach, but over the next six years his rule was increasingly diminished by internal dynastic conflict and external attacks. Finally, in 1183, he abdicated.
  He was twice briefly returned to power in 1185 and 1189, but even within his home kingdom of Connacht he had become politically marginalized. He lived quietly on his estates, and died at the monastery of Cong in 1198 and was buried at Clonmacnoise. With the possible exception of the short reign of Brian Ua Néill (Brian O'Neill; died 1260), no other Gaelic king was ever again recognised as king or high king of Ireland.
caption: Ruaidrí Ua Conchobair
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