The GPO or General Post Office (Ard Oifig an Phoist) is an iconic building in Dublin, and a place that almost all visitors have heard of and all Dubliners reference as a meeting place. The last of the great Georgian buildings of Dublin it became the central headquarters for the postal service now An Post from 1818. Interestingly it was designed by the architect Francis Johnston who came from Armagh, the other Georgian city of Ireland.