Ireland historical timeline

Chronology

432 — Tradition puts St Patrick's arrival in this year, and the conversion of Ireland follows. His Confession, written in Latin, is the earliest Irish historical document, and the Roman alphabet he is credited with introducing is what let Irish monks write down an oral literature that would otherwise be gone.
6th–8th centuries — The monastic golden age. Irish scholars lead Latin learning and Christian theology, missionaries carry it into England and continental Europe, and foreign scholars come the other way to study in Irish monasteries. The high crosses and round towers of Glendalough, Clonmacnoise and Monasterboice are what is left standing of it.
795 — The first recorded Viking raid, by Norwegians. Two centuries of raiding interrupt the golden age; the monasteries are the targets, which is why the round towers exist at all.
852 — Vikings land in Dublin Bay and build a fortress. Dublin becomes a trading centre for raw materials, luxury goods, precious metals, weapons, horses and enslaved people — an Irish capital founded by foreigners as a slave port.
1014 — Brian Boru, High King, defeats the Vikings at Clontarf and Viking power begins to decline. The towns they founded — Dublin, Waterford, Wexford, Limerick, Cork — stay, and are still the country's port cities.
1171 — With the papal bull Laudabiliter behind him, Henry II lands at Waterford with a fleet, the first English king to set foot in Ireland, and grants his Irish territories to his son John as Lord of Ireland. The Normans consolidate by building hundreds of castles and tower houses, which is why County Clare and the east coast are studded with them.
16th century — England's attempts to conquer or assimilate both the Hiberno-Norman lordships and the Gaelic territories into a Kingdom of Ireland produce continuous war: the two Desmond Rebellions and the Nine Years War among them.
1801 — On 1 January, after the United Irishmen rebellion, the Irish Parliament is abolished and Ireland becomes part of the United Kingdom of Great Britain and Ireland. Catholics wait a further generation for full rights, until emancipation.
1845–1849 — The Great Famine. A population of over eight million falls by 30 per cent; one million die and the rest emigrate. Every ruined cottage and every abandoned field boundary in the west dates from it, and so does the global Irish diaspora.
1880 — Charles Stewart Parnell takes the lead of an Irish Parliamentary Party that had been rising since 1874, and the Irish Land League's agrarian agitation wins the Land Acts. Tenants begin to own the ground they farm.
1914 — The Third Home Rule Act passes and receives Royal Assent, then has its implementation suspended until after the First World War. That suspension is what empties the constitutional road.
1916 — The Easter Rising: Irish Volunteers, the Irish Citizen Army and other nationalist groups launch an armed insurrection against British rule in Dublin. The General Post Office on O'Connell Street is still the building it happened in.
1919 — Of 105 Irish MPs elected in December 1918, 73 are Sinn Féin members standing on abstention from the House of Commons; in January they convene their own parliament in Dublin instead. The War of Independence runs to a truce in July 1921.
1922 — The Anglo-Irish Treaty, negotiated in London between 11 October and 6 December 1921, takes effect on 6 December 1922 and makes the island a self-governing Dominion, the Irish Free State. Civil war over the treaty runs from June 1922 to May 1923 and shapes party politics for the rest of the century.
1937 — A plebiscite in July approves a new Constitution, in force on 29 December, naming the state Éire, or Ireland.
1939–1945 — Ireland stays neutral through the Second World War, a period it calls The Emergency.
1949 — The Republic of Ireland Act comes into force on 18 April, ending Dominion status and declaring a republic.
1955 — Ireland joins the United Nations in December, having been kept out for its wartime neutrality.
1973 — Ireland joins the European Economic Community alongside the United Kingdom and Denmark. Half a century of EU membership is the reason a country that exported its people now imports them.
1998 — The Good Friday Agreement, in which the state drops its constitutional claim to Northern Ireland. The border it softened is the one that made Brexit so difficult twenty years later.

Verified against Wikipedia, September 2026.

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Sources & verification Covers the sourced claims on this page.

Checked against Wikipedia — Tradition maintains that in A.D. 432, St. Patrick arrived on the island and, in the years that followed, worked to convert the Irish to Christianity. St…, He is credited with introducing the Roman alphabet, which enabled Irish monks to preserve parts of the extensive oral literature, Irish scholars excelled in the study of Latin learning and Christian theology in the monasteries that flourished shortly thereafter. Missionaries from…, The first recorded Viking raid in Irish history occurred in 795 AD when Vikings from Norway looted the island ... These early raids interrupted the golden…, In 852, the Vikings landed in Dublin Bay and established a fortress. Dublin became the centre for the trade of many goods like raw materials, luxury items,…, The great High King of Ireland, Brian Boru, defeated the Vikings at the Battle of Clontarf in 1014 which began the decline of Viking power in Ireland, but…, With the authority of the papal bull Laudabiliter from Adrian IV, Henry landed with a large fleet at Waterford in 1171, becoming the first King of England…, The Normans consolidated their presence in Ireland by building hundreds of castles and towers, England's attempts either to conquer or to assimilate both the Hiberno-Norman lordships and the Gaelic territories into the Kingdom of Ireland provided the…, On 1 January 1801, in the wake of the republican United Irishmen Rebellion, the Irish Parliament was abolished and Ireland became part of a new United…, From the Act of Union on 1 January 1801, until 6 December 1922, the island of Ireland was part of the United Kingdom of Great Britain and Ireland. During…, From 1874, and particularly under Charles Stewart Parnell from 1880, the Irish Parliamentary Party gained prominence. This was firstly through widespread…, Home Rule seemed certain when the Parliament Act 1911 abolished the veto of the House of Lords, and John Redmond secured the Third Home Rule Act in 1914, Though it received the Royal Assent and was placed on the statute books in 1914, the implementation of the Third Home Rule Act was suspended until after the…, The remainder of the Irish Volunteers ... launched an armed insurrection against British rule in the 1916 Easter Rising, together with the Irish Citizen…, In January 1919, after the December 1918 general election, 73 of Ireland's 105 Members of Parliament (MPs) elected were Sinn Fein members who were elected…, After the War of Independence and truce called in July 1921, representatives of the British government and the five Irish treaty delegates, led by Arthur…, In accordance with the treaty, on 6 December 1922 the entire island of Ireland became a self-governing Dominion called the Irish Free State, The Irish Civil War (June 1922 - May 1923) was the consequence of the ratification of the Anglo-Irish Treaty and the creation of the Irish Free State, Following a national plebiscite in July 1937, the new Constitution of Ireland (Bunreacht na hEireann) came into force on 29 December 1937, Ireland remained neutral during World War II, a period it described as The Emergency, Ireland's Dominion status was terminated with the passage of The Republic of Ireland Act 1948, which came into force on 18 April 1949 and declared that the…, Ireland became a member of the United Nations in December 1955, after having been denied membership because of its neutral stance during the Second World War, In 1973 Ireland joined the European Economic Community along with the United Kingdom and Denmark. The country signed the Lisbon Treaty in 2007, It was not until the 1998 Good Friday Agreement, when the state dropped its claim to Northern Ireland, that it began calling [Northern Ireland by that name] (September 2026).