Dún Laoghaire or Dún Laoire is a suburban seaside town and county seat of Dun Laoghaire-Rathdown County, Ireland.
The town is situated some 12 kilometres south of Dublin city centre, and is a major port of entry from Great Britain.
The town's name derives from Laoghaire, a 5th century High King of Ireland, who chose the site as a sea base from which to carry out raids on Britain and Gaul. Dún is an Irish word meaning fort, and traces of fortifications from that period have been found on the coast.
The present town of Dún Laoghaire dates from the 1820s.
Source: Wikipedia
