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
Naul, Dublin Naul, Dublin Naul (, also known as "The Naul"), is a village at the northern edge of Fingal and the traditional County Dublin, Ireland. At the northern side of the village, the Delvin River marks the boundary with County Meath. Naul is also a civil parish in the historic barony of Balrothery West. The village is a crossroads between the R122 and R108 regional roads, the latter being the traditional route between Dublin and the port of Drogheda, while the R122 travels from Finglas in the south to Balbriggan. The River Delvin passes Naul to the north, with cliffs of