Description The General Post Office (GPO) (Irish: Ard-Oifig an Phoist) in Dublin is the headquarters of the Irish postal service An Post, and Dublin's principal post office. Sited in the centre of the city's main thoroughfare O'Connell Street, it is one of Ireland's most famous buildings and was the last of the great Georgian public buildings to be erected in the capital.ArchitectureThe GPO was at first located in a small building on the site of where the Commercial Buildings used to be (now the Central Bank building) off Dame Street, and was afterwards removed to a larger house opposite the Bank of Ireland building on College Green, and on 6 January 1818, the new post-office in Sackville Street (now O'Connell Street) was opened for business. The foundation-stone of the building, which is built after a design of Francis Johnston, was laid by Charles Whitworth, 1st Earl Whitworth on 12 August, 1814, and the structure was completed in the short space of three years, for the sum of 50,000. The front, which extends 67.1 metres (220 ft), has a portico (24.4 metres (80 ft) wide), of six fluted Ionic columns, 137.16 centimetres (54 inches) in diameter. The frieze of the entablature is highly enriched, and in the tympanum of the pediment are the royal arms. On the acroteria of the pediment are three statues by John Smyth: Mercury on the right, with his Caduceus and purse; On the left Fidelity, with her finger on her lip, and a key in her hand; and in the centre Hibernia, resting on her spear, and holding a harp. The entablature, with the exception of the architrave, is continued along the rest of the front; the frieze, however, is not decorated over the portico. A handsome balustrade surmounts the cornice of the building, which is 15.2 metres (50 ft) from the ground. With the exception of the portico, which is of Portland stone, the whole is of mountain granite. The elevation has three stories, of which the lower or basement is rusticated, and in this respect it resembles the Indi