The Irish Boundary Commission (Irish: "Coimisiún na Teorainne" ) met in 1924–25 to decide on the precise delineation of the border between the Irish Free State and Northern Ireland.
 The 1921 Anglo-Irish Treaty, which ended the War of Independence, provided for such a commission if Northern Ireland chose to secede from the Irish Free State, an event that occurred as expected two days after the Free State's inception on 6 December 1922.
 The governments of the United Kingdom, of the Irish Free State and of Northern Ireland were to nominate one member each to the commission.
 When the Northern government refused to cooperate, the British government assigned a Belfast newspaper editor to represent Northern Irish interests.
The original Irish Republican Army (IRA) fought a guerrilla war against British rule in Ireland in the Irish War of Independence between 1919 and 1921.
 Following the signing of the Anglo-Irish Treaty on 6 December 1921, the IRA in the 26 counties that were to become the Irish Free State split between supporters and opponents of the Treaty.
 The anti-Treatyites, sometimes referred to by Free State forces as Irregulars, continued to use the name Irish Republican Army (IRA) or in Irish Óglaigh na hÉireann, as did the organisation in Northern Ireland which originally supported the pro-Treaty side (if not the Treaty). "
Óglaigh na hÉireann" was also adopted as the name of the pro-Treaty National Army, and remains the official legal title of the Irish Defence Forces.
 This article deals with the anti-Treaty IRA that fought against the Irish Free State in the Irish Civil War, and with its successors up to 1969, when the IRA split again.
Bryan Ricco Cooper (17 June 1884 – 5 July 1930) was an Irish politician, writer and landowner from Markree Castle, County Sligo.
 He was prominent in Dáil Éireann in the early years of the Irish Free State, having previously served as MP to Westminster for South Dublin County (1910), a seat he subsequently represented in the Dáil from 1923 to 1930.
The Constitution of Ireland plebiscite, also known as the Plebiscite on the Draft Constitution, was a plebiscite held in the Irish Free State to approve the adoption of a new constitution for the country.
 The vote was held on 1 July 1937, the same day as the general election.
 It was passed by a plurality, with 56% of voters in favour, comprising 38.6% of the whole electorate.
 As a result, the current Constitution of Ireland came into effect on 29 December 1937, ending the Irish Free State.
 It was the only plebiscite to take place in the Irish Free State.
 It was also the only referendum that was officially called a plebiscite in the history of the country; all subsequent votes of this nature have taken place under the provisions of the current Irish constitution and are referred to as referendums.
The current Constitution of Ireland came into effect on 29 December 1937, having been enacted by a national plebiscite on 1 July 1937 of voters in what was then the Irish Free State.
 The Constitution was closely associated with Éamon de Valera, the President of the Executive Council of the Irish Free State at the time, who was personally eager to replace the Constitution of the Irish Free State.
Dáil Éireann ( ; lit.
 "Assembly of Ireland") is the lower house, and principal chamber, of the Oireachtas (Irish legislature), which also includes the President of Ireland and Seanad Éireann (the upper house).
 It currently consists of 158 members, representing 40 constituencies, and is directly elected at least once every five years under the system of proportional representation by means of the single transferable vote (STV).
 Its powers are similar to those of lower houses under many other bicameral parliamentary systems and it is by far the dominant branch of the Oireachtas.
 Subject to the limits imposed by the Constitution of Ireland, it has power to pass any law it wishes, and to nominate and remove the Taoiseach (head of government).
 Since 1922, it has met in Leinster House in Dublin.
The Courts of Justice Act, 1924 was an Act of the Oireachtas (No. 10 of 1924) that established a new system of courts for the Irish Free State (now the Republic of Ireland).
 Among the new courts was the Supreme Court of the Irish Free State, and the first Chief Justice of the Irish Free State was also appointed under the Act.
Seanad Éireann (] ; "Senate of Ireland") was the upper house of the Oireachtas (parliament) of the Irish Free State from 1922 to 1936.
 It has also been known simply as the Senate, First Seanad, Free State Senate or Free State Seanad.
 The Senate was established under the 1922 Constitution of the Irish Free State but a number of constitutional amendments were subsequently made to change the manner of its election and its powers.
 It was eventually abolished in 1936 when it attempted to obstruct constitutional reforms favoured by the government.
 It sat, like its modern successor, in Leinster House.
Comhairle na dTeachtaí was an Irish republican parliament established by opponents of the 1921 Anglo-Irish Treaty and the resulting Irish Free State, and viewed by republican legitimatists as a successor to the Second Dáil.
 Members were abstentionist from the Third Dáil established by the pro-Treaty faction.
 Just as the First Dáil established a parallel Irish Republic in opposition to the British Dublin Castle administration, so Comhairle na dTeachtaí attempted to establish a legitimatist government in opposition to the Provisional Government and Government of the Irish Free State established by the Third Dáil.
 This legitimatist government, called the Council of State, had Éamon de Valera as President.
 In 1926 de Valera resigned as President, left the Sinn Féin party and founded Fianna Fáil, which in 1927 entered the Fourth Dáil.
 Comhairle na dTeachtaí, never more than a symbolic body, was thereby rendered defunct.
 In 1930 Cumann na nGaedheal TDs alleged in the Dáil that de Valera had addressed Comhairle na dTeachtaí in December 1926, after the foundation of Fianna Fáil; this was to cast aspersions on de Valera's commitment to the Constitution of the Irish Free State.
The Constitution of the Irish Free State (Irish: "Bunreacht Shaorstáit Eireann" ) was the second constitution of the independent Irish state.
 It was adopted by Act of Dáil Éireann sitting as a constituent assembly on 25 October 1922.
 In accordance with Article 83 of the Constitution, the Irish Free State Constitution Act 1922 of the British Parliament, which came into effect upon receiving the royal assent on 5 December 1922, provided that the Constitution would come into effect upon the issue of a Royal Proclamation, which was done on 6 December 1922.
 In 1937 the Constitution of the Irish Free State was replaced by the modern Constitution of Ireland following a referendum.

Question: Where does the house that Bryan Cooper belonged to in the early years of the Irish Free State meet?
Answer: Leinster House in Dublin