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
National Botanic Gardens (Ireland) association with the Office of Public Works (OPW), Dublin local authority parks departments, and the Golfing Union of Ireland. The Director is the chief officer of the Gardens, with a residence provided on site. Directors have included: National Botanic Gardens (Ireland) The National Botanic Gardens (Irish: "Garraithe Náisiúnta na Lus") are located in Glasnevin, 5 km north-west of Dublin city centre, Ireland. The 19.5 hectares are situated between Prospect Cemetery and the River Tolka where it forms part of that river's floodplain. The gardens were founded in 1795 by the Dublin Society (later the Royal Dublin Society) and are today