Erected in the early thirteenth century on the site of a Viking settlement, Dublin Castle served for centuries as the headquarters of English, and later British, administration in Ireland. In 1922, following Ireland’s independence, Dublin Castle was handed over to the new Irish government. It is now a major government complex and a key tourist attraction.

City Hall was built between 1769 and 1779. The build took ten years to complete. When they decided to build City Hall a competition was advertised and 62 submissions were made. The winner of this Competition was Thomas Cooley, a young architect from London. At the time, James Gandon would have been the primary architect in Dublin, but his designs came second in the competition. Thomas Cooley was also tendered to build the Four Courts, however at 44 years of age, he fell ill and died and therefore James Gandon became the primary architect in the building of the Four Courts.

This is the heart of the night life of Dublin

Before the Ha'penny Bridge was built there were seven ferries, operated by a William Walsh, across the Liffey.[2] The ferries were in a bad condition and Walsh was informed that he had to either fix them or build a bridge. Walsh chose the latter option and was granted the right to extract a ha'penny toll from anyone crossing it for 100 years.[6] Initially the toll charge was based not on the cost of construction, but to match the charges levied by the ferries it replaced. A further condition of construction was that, if the citizens of Dublin found the bridge and toll to be "objectionable" within its first year of operation, it was to be removed at no cost to the city.[3] The toll was increased for a time to a penny-ha'penny (1½ pence), but was eventually dropped in 1919. While the toll was in operation, there were turnstiles at either end of the bridge.