Skip to main content
CountryReports

Expanded History

History of Ireland

From antiquity to the modern era — the historical eras, key events, and narrative that shaped Ireland.

Speed

Overview

The Irish people are mainly of Celtic origin, with the country’s only significant sized minority having descended from the Anglo-Normans. English is the common language, but Irish (Gaelic) is also an official language and is taught in schools.

Anglo-Irish writers such as Swift, Sheridan, Goldsmith, Burke, Wilde, Joyce, Yeats, Shaw, and Beckett have made a major contribution to world literature over the past 300 years.

The earliest inhabitants--people of a mid-Stone Age culture--arrived about 6000 BC. About 4,000 years later, tribes from southern Europe arrived and established a high Neolithic culture, leaving behind gold ornaments and huge stone monuments. The Bronze Age people, who arrived during the next 1,000 years, produced elaborate gold and bronze ornaments and weapons.

The Iron Age arrived abruptly in the fourth century BC with the invasion of the Celts, a tall, energetic people who had spread across Europe and Great Britain in the preceding centuries. The Celts, or Gaels, and their more numerous predecessors divided into five kingdoms in which, despite constant strife, a rich culture flourished.

The coming of Christianity from across the Irish Sea brought major changes and civilizing influences. Tradition maintains that St. Patrick arrived on the island in AD 432 and, in the years that followed, worked to convert the Irish to Christianity.

The pagan druid tradition collapsed before the spread of the new faith, and Irish scholars excelled in the study of Latin learning and Christian theology in the monasteries that flourished. Missionaries went forth from Ireland to England and the continent, spreading news of the flowering of learning, and scholars from other nations came to Irish monasteries. The excellence and isolation of these monasteries helped preserve Latin and Greek learning during the Dark Ages. The arts of manuscript illumination, metalworking, and sculpture flourished and produced such treasures as the Book of Kells, ornate jewelry, and the many carved stone crosses that dot the island.

Two hundred years of Viking invasion and settlement was later followed by a Norman conquest in the 12th century. The Norman conquest resulted in the assimilation of the Norman settlers into Irish society. The early 17th century saw the arrival of Scottish and English Protestants, sent as colonists to the north of Ireland and the Pale around Dublin.

In 1800 the Irish Parliament passed the Act of Union with Great Britain, and Ireland was an official part of the United Kingdom until 1921. Religious freedom, outlawed in the 18th century, was restored in 1829, but this victory for the Irish Catholic majority was overshadowed by a severe economic depression and the great famine from 1846-48 when the potato crop failed. Millions died, and the millions that emigrated spawned the first mass wave of Irish emigration to the United States. A decade later, in 1858, the Irish Republican Brotherhood (IRB--also known as the Fenians) was founded as a secret society dedicated to armed rebellion against the British. An aboveground political counterpart, the Home Rule Movement, was created in 1874, advocating constitutional change for independence.

Galvanized by the leadership of Charles Stewart Parnell, the party was able to force British governments after 1885 to introduce several home rule bills. The turn of the century witnessed a surge of interest in Irish nationalism, including the founding of Sinn Fein ("Ourselves Alone") as an open political movement.

Nationalism was and is a potent populist force in Irish politics. A home rule bill passed in 1914, but its implementation was suspended until war in Europe ended. Believing the mantra: “England’s problem is Ireland’s opportunity,” and tapping into a mood of Gaelic revivalism, Padraic Pearse and James Connolly led the unsuccessful Easter Rising of 1916. Pearse and the other 1916 leaders declared an independent Irish republic, but a lack of popular support doomed the rebellion, which lasted a week and destroyed large portions of Dublin. The decision by the British military government to execute the leaders of the rebellion, coupled with the British Government’s threat of conscripting the Irish to fight in the Great War, alienated public opinion and produced massive support for Sinn Fein in the 1918 general election. Under the leadership of Eamon de Valera, the elected Sinn Fein deputies constituted themselves as the first Dail. Tensions only increased: British attempts to smash Sinn Fein ignited the Anglo-Irish War of 1919-1921.

The end of the war brought the Anglo-Irish treaty of 1921, which established the Irish Free State of 26 counties within the British Commonwealth and recognized the partition of the island into Ireland and Northern Ireland, though supposedly as a temporary measure. The six predominantly Protestant counties of northeast Ulster--Northern Ireland--remained a part of t

Historical Eras

The major periods of {country}’s history at a glance.

  1. Prehistoric & Celtic Ireland

    6000 BCE – 432

    The earliest settlers arrived around 6000 BC, followed by Neolithic and Bronze Age peoples who left behind megalithic monuments and elaborate goldwork. Celtic tribes invaded from the fourth century BC onward, establishing five kingdoms with a rich oral and artistic culture. This Gaelic civilization, though marked by constant inter-kingdom conflict, laid the linguistic and cultural foundations of Irish identity.

  2. Christian & Monastic Era

    432 – 1169

    St. Patrick's arrival in 432 initiated the rapid Christianization of Ireland, displacing the druid tradition and spurring the founding of great monasteries at Clonmacnoise, Armagh, and Iona. Irish monks preserved Latin and Greek learning through the European Dark Ages and produced masterworks such as the Book of Kells. Two centuries of destructive Viking raids beginning in the late 8th century reshaped settlement patterns before Brian Boru's decisive victory at Clontarf in 1014 broke Norse power.

  3. Norman & Medieval Ireland

    1169 – 1534

    The Anglo-Norman invasion beginning in 1169, sanctioned by Pope Adrian IV and led by Richard de Clare ('Strongbow'), brought feudal structures and English royal claims to Ireland. Norman settlers gradually assimilated into Gaelic society, becoming 'more Irish than the Irish themselves,' a process the English Crown attempted to reverse through the Statutes of Kilkenny in 1366. English authority in practice contracted to a coastal enclave around Dublin known as the Pale, while Gaelic lords and Hiberno-Norman dynasties dominated the interior.

  4. Tudor & Stuart Conquest

    1534 – 1691

    Henry VIII's break with Rome transformed Irish resistance into a religious as well as political conflict, as the Crown imposed Protestantism on a predominantly Catholic population. The Ulster Plantation of the early 17th century settled Scottish and English Protestants on confiscated Gaelic lands, fundamentally altering the north's demographic character. Successive rebellions — including the Great Catholic-Gaelic Rebellion of 1641 and Cromwell's brutal campaign of 1649-52 — were crushed, and the Williamite victory at the Battle of the Boyne in 1690 entrenched Protestant Ascendancy.

  5. Union & Nationalist Struggle

    1691 – 1921

    Penal Laws systematically excluded Catholics from land ownership, education, and political life; by 1714 Catholics held barely 7% of Irish land. The Act of Union in 1800 dissolved the Irish Parliament and bound Ireland directly to Westminster, while the Great Famine of 1845–52 killed over one million and triggered mass emigration that permanently transformed the island's population. The Irish Republican Brotherhood, the Home Rule movement under Parnell, and finally the Easter Rising of 1916 built the momentum that brought the Anglo-Irish War and the 1921 Treaty establishing the Irish Free State.

  6. Independent Ireland

    1921 – present

    The Irish Free State was established in 1922 following partition, with six Ulster counties remaining in the United Kingdom; a devastating civil war over the Treaty's terms followed almost immediately. Full republican status was declared in 1948, and Ireland's accession to the European Community in 1973 accelerated economic and social modernization. The 1998 Good Friday Agreement, brokered with British and American involvement, brought an uneasy peace to Northern Ireland and opened new possibilities for cross-border cooperation.

Timeline Preview

The first 7 key events. View the full chronology on the timeline page.

  1. 600 BCE – 150 BCE

    Celtic tribes settled on the island

    Celtic tribes settled on the island.

  2. 100 BCE

    Arrival of the Gaels

    Arrival of the Gaels.

  3. 432

    Arrival of St. Patrick

    Arrival of St. Patrick to help convert pagan Irish Gaelic Kings to Christianity.

  4. 461

    St. Patrick dies

    St. Patrick dies, after having achieved his dream of introducing both Roman Civilization, and the Christian Church to Ireland.

  5. 920

    Vikings established settlements at Limerick

    Vikings established settlements at Limerick.

  6. 1167 – 1169

    Arrival of Normans

    Arrival of Normans at Baginbun in Co. Wexford thus started 800 year struggle between English and Irish.

  7. 1547

    Henry VIII dies

    Henry VIII dies, succeeded by the boy king Edward VI. England and Ireland were ruled by the senior nobility of England.