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
Greenhills, Dublin Greenhills, Dublin Greenhills () is a suburb of Dublin in Ireland. It lies between Kimmage, Tallaght, Templeogue, Terenure and Walkinstown, and includes the residential developments of Greenhills Estate, Greenpark, Limekiln Estate and Temple Manor. Greenhills is in the Dublin 12 postal area. The area was mostly farmland until expansion in the 1950s and 1960s led to the building of new housing estates. However, Greenhills, situated just below the esker upon which the Greenhills Road now runs, may have housed settlements as long ago as 1800 BC. An urn dating from that time, found in the late 1890s in the former