Dublin’s history is unusually legible on the ground. The black pool is under the castle, the Norman city wall is in the crypt, the Georgian squares are intact, the tenements are still standing in the Liberties, and the GPO has bullet marks in the columns.
This is the narrative version; the dated one is in the timeline.
Vikings, 841
There was a monastic settlement here before, but the city dates from the Norse longphort — a fortified ship harbour — established around 841 at the confluence of the Liffey and the Poddle, where the tidal pool gave it its name.
Dublin became one of the largest slave markets in western Europe, trading captives taken in raids across Britain and Ireland. That is not a footnote; it was the main business of the town for two centuries.
The Norse were defeated at Clontarf in 1014 by Brian Boru, who was killed in the battle. Dublin continued as a Norse-Gaelic city regardless, and its king founded Christ Church around 1030.
Normans, 1170
Diarmait Mac Murchada, deposed king of Leinster, invited Anglo-Norman mercenaries to help him regain his throne. Strongbow took Dublin in 1170, married Diarmait’s daughter, and Henry II arrived the following year to make sure his barons did not set up an independent kingdom.
Dublin became the seat of English administration and remained so for 750 years. Dublin Castle was begun in 1204.
English control contracted over the following centuries to the Pale, a fortified area around Dublin — the origin of “beyond the pale”. Outside it, Gaelic and Hiberno-Norman lords governed themselves.
The Georgian city, 1700–1800
The eighteenth century made Dublin. The Irish Parliament sat at College Green, a Protestant Ascendancy ruled a Catholic country, and the money produced the city’s best architecture: the squares — Merrion, Fitzwilliam, Mountjoy — the Custom House, the Four Courts, the Parliament House itself.
At its peak Dublin was the second city of the British Empire and one of the largest in Europe.
The 1798 rebellion and its suppression ended it. The Act of Union in 1801 abolished the Irish Parliament, the aristocracy moved to London, and the city’s economy went with them. The Georgian houses were subdivided into tenements almost immediately.
Famine and decline, 1845–1900
The Great Famine killed around a million people and drove a million more to emigrate, and the population of the island has never recovered to its pre-Famine level. Dublin filled with rural destitute.
By 1900 the city had some of the worst slums in Europe — a quarter of the population living in single-room tenancies in decaying Georgian houses. Two collapsed on Church Street in 1913 killing seven people. The 1913 Lockout, when 20,000 workers were locked out by their employers for eight months, came from the same conditions.
Revolution, 1916–1923
The Easter Rising in 1916, the executions at Kilmainham, the 1918 election, the War of Independence, and the Treaty that partitioned the island.
Then the Civil War between those who accepted the Treaty and those who did not — which destroyed the Four Courts and the Custom House, killed Michael Collins, and produced a bitterness that structured Irish politics for eighty years.
The long poverty, 1923–1990
Independent Ireland was poor, conservative and emigrating. The state was small, the Catholic Church ran the schools and the hospitals, censorship was severe, and Dublin’s population left for Britain and America in every decade.
The city itself was neglected: Georgian terraces demolished for office blocks in the 1960s and 70s, the Wood Quay Viking site concreted over in 1979 despite the largest heritage protest in Irish history.
The Celtic Tiger and after, 1990–
EU membership, foreign investment, an educated young workforce and low corporation tax produced growth in the mid-1990s that was genuinely extraordinary. Dublin went from emigration to immigration inside a decade.
The 2008 crash was correspondingly severe — the banking collapse, the bailout, austerity, and emigration resuming.
Recovery came, and with it the current shape of the city: the tech offices in the Docklands, a young and increasingly international population, and a housing crisis that is the dominant political fact of Dublin life and the thing any resident will raise within ten minutes.