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
Delvin River February to September. Trout fishing is usually catch a release; spinner reel fishing on one shore is allowed. Most trout are in the 2 pound range. Rivers of Ireland Delvin River The River Delvin () is a river of north County Dublin, about long and forming much of the Dublin-Meath boundary. It is largely under the responsibility of Fingal County Council, sometimes shared with Meath County Council. The Delvin rises north west of the village of Garristown, from which Garristown Stream joins it, and flows in a north easterly direction, forming much of the Dublin-Meath county boundary. It passes just