Dublin Castle Ireland (1800–1922). After the signing of the Anglo-Irish Treaty in December 1921, the complex was ceremonially handed over to the newly formed Provisional Government led by Michael Collins. It now hosts the inauguration of each President of Ireland, and various State receptions. The castle was built by the dark pool ("Dubh Linn") which gave Dublin its name. This pool lies on the lower course of the River Poddle before its confluence with the River Liffey; when the castle was built, the Liffey was much wider, and the castle was effectively defended by both rivers. The Poddle today runs under the
Transport in Ireland Republic of Ireland, outside Dublin, including an express coach network connecting most cities in Ireland, along with local bus services in the provincial cities. Bus Átha Cliath (Dublin Bus), a sister company of Bus Éireann, provides most of the bus services in Dublin, with some other operators providing a number of routes. These include Aircoach, a subsidiary of FirstGroup which provides services to Dublin Airport from Dublin city centre, South Dublin City, Greystones and Bray. They also operate two intercity express non-stop services service between Dublin Airport, Dublin City Centre, and Cork and also a non-stop route between Belfast City