Parliament of Ireland in the context of "Irish Unionism"

The Acts of Union 1800 (Irish: Achtanna an Aontais 1800) were parallel acts of the Parliament of Great Britain and the Parliament of Ireland which united the Kingdom of Great Britain and the Kingdom of Ireland (previously in personal union) to create the United Kingdom of Great Britain and Ireland. The acts came into force between 31 December 1800 and 1 January 1801, and the merged Parliament of the United Kingdom had its first meeting on 22 January 1801.

Provisions of the acts remain in force, with amendments and some Articles repealed, in the United Kingdom, but they have been repealed in their entirety in the Republic of Ireland.

Unionism in Ireland is a political tradition that professes loyalty to the crown of the United Kingdom and to the union it represents with England, Scotland and Wales. The overwhelming sentiment of Ireland's Protestant minority, unionism mobilised in the decades following Catholic Emancipation in 1829 to oppose restoration of a separate Irish parliament. Since Partition in 1921, as Ulster unionism its goal has been to retain Northern Ireland as a devolved region within the United Kingdom and to resist the prospect of an all-Ireland republic. Within the framework of the 1998 Belfast Agreement, which concluded three decades of political violence, unionists have shared office with Irish nationalists in a reformed Northern Ireland Assembly. As of February 2024, they no longer do so as the larger faction: they serve in an executive with an Irish republican (Sinn Féin) First Minister.

Unionism became an overarching partisan affiliation in Ireland late in the nineteenth century. Typically Presbyterian agrarian-reform Liberals coalesced with traditionally Anglican, Orange Order allied, Conservatives against the Irish Home Rule Bills of 1886 and 1893. Joined by loyalist labour, on the eve of World War I this broad opposition to Irish self-government concentrated in Belfast and its hinterlands as Ulster unionism and prepared an armed resistance—the Ulster Volunteers.

The Union of the Crowns (Scottish Gaelic: Aonadh nan Crùintean; Scots: Union o the Crouns) was the accession of James VI of Scotland to the thrones of England and Ireland as James I on 24 March 1603, and the consequent formation of a personal union between the Kingdoms of England, Scotland, and Ireland. It followed the death of James's cousin, Elizabeth I of England, the last monarch of the Tudor dynasty.

England, Scotland, and Ireland remained separate states with separate parliaments until the Acts of Union of 1707 united England and Scotland into a unitary Kingdom of Great Britain; Ireland retained a legally separate Crown and Parliament, albeit as a practical dependency, until 1801. However, there was a republican interregnum in the 1650s, during which the Tender of Union of Oliver Cromwell created the Commonwealth of England and Scotland, which ended with the Stuart Restoration.

Monarchical systems of government have existed in Ireland from ancient times. This continued in all of Ireland until 1949, when the Republic of Ireland Act removed most of Ireland's residual ties to the British monarch. Northern Ireland, as part of the United Kingdom, remains under a monarchical system of government.

The office of High King of Ireland effectively ended with the Anglo-Norman invasion of Ireland (1169–1171) in which the island was declared a fief of the Holy See under the Lordship of the King of England. In practice, conquered territory was divided amongst various Anglo-Norman noble families who assumed title over both the land and the people with the prior Irish inhabitants being either displaced or subjugated under the previously alien system of serfdom. Though the revolutionary change in the status quo was undeniable, the Anglo-Norman invaders would fail to conquer many of the Gaelic kingdoms of Ireland, which continued to exist, often expanding for centuries after, however none could make any viable claims of High Kingship. This lasted until the Parliament of Ireland conferred the crown of Ireland upon King Henry VIII of England during the English Reformation. Henry initiated the Tudor conquest of Ireland which ended Gaelic political independence from the English monarch who now held the crowns of England and Ireland in a personal union.

The Kingdom of Ireland (Early Modern Irish: Ríoghacht Éireann; Modern Irish: Ríocht na hÉireann, pronounced [ənˠ ˌɾˠiːxt̪ˠ ˈeːɾʲən̪ˠ]) was a dependency of England from 1542 to 1707, and subsequently Great Britain from 1707 to 1800. It was ruled by the monarchs of England and then of Great Britain in personal union, and was administered from Dublin Castle by a viceroy appointed by the English king: the Lord Lieutenant of Ireland. By the late 17th century, the state was dominated by the Protestant Anglo-Irish minority, known as the Protestant Ascendancy. The Protestant Church of Ireland was the state church. The Parliament of Ireland was almost exclusively Anglo-Irish. From 1661, the administration controlled an Irish army. Although formally a kingdom in personal union on equal footing with England and later Great Britain, for most of its history it was de facto a dependency with a viceroy sent as an envoy from London. This status was enshrined in the Declaratory Act 1719, also known as the Irish Parliament Act 1719.

The territory of the kingdom comprised that of the former Lordship of Ireland, founded in 1177 by King Henry II of England and the English Pope Adrian IV, after the Anglo-Norman invasion of Ireland. By the 16th century, the Pale, the area of effective English rule, had shrunk greatly; most of Ireland was held by Gaelic nobles as minor principalities notionally subject to London but independent in practice. By the terms of the Crown of Ireland Act 1542, Henry VIII of England became "King of Ireland", theoretically elevating Ireland to coequal status with England as a kingdom in personal union. There followed an expansion of English control during the Tudor conquest. This sparked the Desmond Rebellions and the Nine Years' War. The conquest of the island was completed early in the 17th century. It involved the confiscation of land from the native Irish Catholics and its colonisation by Protestant settlers from Britain. Most Catholic countries at the time did not recognise Protestant monarchs as legitimate kings of Ireland (or indeed of England), instead supporting the Jacobite government-in-exile from 1688 onwards.

In the first Parliament to be held after the Union of Great Britain and Ireland on 1 January 1801, the first House of Commons of the United Kingdom was composed of all 558 members of the former Parliament of Great Britain and 100 of the members of the House of Commons of Ireland.

The Parliament of Great Britain had held its last general election in 1796 and last met on 5 November 1800. The final general election for the Parliament of Ireland had taken place in 1797, although by-elections had continued to take place until 1800.

The Oireachtas of the Irish Free State (Irish: Oireachtas Shaorstát Éireann) was the legislature of the Irish Free State from 1922 until 1937. It was established by the 1922 Constitution of Ireland which was based from the Anglo-Irish Treaty. It was the first internationally recognised independent Irish Parliament since the historic Parliament of Ireland which was abolished with the Acts of Union 1800.

The Parliament was bicameral, consisting of Dáil Éireann (the lower house, also known as the Dáil) with 153 seats and Seanad Éireann (the upper house; also known as the Seanad) with 60 seats). The Seanad was abolished on 29 May 1936, and from then until its abolition the Oireachtas was unicameral. The King, who was officially represented by the Governor-General, was also a constituent part of the Oireachtas. The Oireachtas of the Irish Free State was disbanded by the 1937 Constitution of Ireland which created the modern Oireachtas.

The Whigs were a political party in the Parliaments of England, Scotland, Ireland, Great Britain and the United Kingdom. Between the 1680s and the 1850s, the Whigs contested power with their rivals, the Tories. The Whigs became the Liberal Party when the faction merged with the Peelites and Radicals in the 1850s. Many Whigs left the Liberal Party in 1886 over the issue of Irish Home Rule to form the Liberal Unionist Party, which merged into the Conservative Party in 1912.

The Whigs began as a political faction that opposed absolute monarchy and Catholic emancipation, supporting constitutional monarchism and parliamentary government, but also Protestant supremacy. They played a central role in the Glorious Revolution of 1688 and were the standing enemies of the Roman Catholic Stuart kings and pretenders. The period known as the Whig Supremacy (1714–1760) was enabled by the Hanoverian succession of George I in 1714 and the failure of the Jacobite rising of 1715 by Tory rebels. The Whigs took full control of the government in 1715 and thoroughly purged the Tories from all major positions in government, the army, the Church of England, the legal profession, and local political offices. The first great leader of the Whigs was Robert Walpole, who maintained control of the government from 1721 to 1742, and whose protégé, Henry Pelham, led the government from 1743 to 1754. Great Britain approximated a one-party state under the Whigs until King George III came to the throne in 1760 and allowed Tories back in; however, the Whig Party's hold on power remained strong for many years thereafter. Historians have called the period from roughly 1714 to 1783 the "long period of Whig oligarchy". During the American War of Independence, the Whigs were the party more sympathetic to American independence and the creation of a democracy in the United States.