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
River Dee (Ireland) Annagassan. The Dee in turn has three main tributaries: the Killary River which joins south of Drumconrath, Co. Meath, the Gara River which joins west of Ardee, Co. Louth, and the White River which joins north of Dunleer, Co Louth. There is one lake on the Dee called Whitewood Lake which is near Nobber, Co. Meath. The River Dee is a brown trout fishery. River Dee (Ireland) ف The River Dee () is a river in eastern Ireland, flowing from Co. Cavan to join the Glyde in Co. Louth. In the "Táin Bó Cúailnge", Cúchulainn fights Lethan at Ath Carpat