The ancient Greeks knew of a settlement there. Ptolemy the Egyptian-Greek astronomer and cartographer referred to a settlement called 'Eblana' around the year A.D. 140.
However, the Vikings are credited with founding the large settlement which became a town. They did this in about 841.
Officially the city got a charter in 988.
It wasn't "built" in such a as to be able to put a year on it and say "Dublin was built in XYZ AD." Cities in Europe aren't like that.
Dublin is built at the mouth of the river Liffey.
Trinity College Dublin was founded in 1592. The buildings that make it up now, are of various ages, some centuries old and some very modern.
Dublin is a city and a county. The shape of the county is shown below. Also is a map of the built up area of Dublin.
Dublin has official status since the year 988, over 1000 years ago now, but there would have been a settlement there as early as the second century, so 800 years before that.
The Liffey is the main river in Dublin, being the one the city is built on. The Dublin and Wicklow mountains are to the south of the city.
It is the main river on which the city of Dublin in Ireland is built.
The plant is in Dublin, Virginia.
Dublin, the capital city of Ireland, is built on it.
Ireland. Dublin, the capital city, is built on it.
Dubh Linn, are the Irish words for Black Pool. A settlement where Dublin now is, was close to a black pool on the river Liffey, the river that Dublin is now built on. It is from that that the modern name Dublin originates.
The Liffey is the name of the river on which Dublin, the capital of Ireland, is built.
The earliest manuscript dates Christ Church cathedral to its present location in Dublin around 1030AD. Dúnán, the first bishop of Dublin and Sitriuc, Norse king of Dublin, founded the original Viking church.