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
Royal Dublin Society Royal Dublin Society The Royal Dublin Society (RDS) is the name given in 1820 to a philanthropic organisation which was founded as the 'Dublin Society' on 25 June 1731 to see Ireland thrive culturally and economically. The RDS is synonymous with its campus in Ballsbridge in Dublin, Ireland. This campus includes the "RDS Arena", "RDS Simmonscourt", "RDS Main Hall" and other venues which are used regularly for exhibitions, concerts and sporting events, including regular use by the Leinster Rugby team. The society was founded by members of the Dublin Philosophical Society, chiefly Thomas Prior, as the 'Dublin Society for improving