An Garda Síochána is the national police service of Ireland. The Mission of An Garda Síochána is Working with Communities to Protect and Serve. Following the establishment of the Irish Free State in 1922, the Dublin Metropolitan Police merged with the recently established An Garda Síochána in 1925. The Garda Museum and Archives are located at the Record Tower, Dublin Castle. Here visitors will find an interesting exhibition about the history of An Garda Síochána and information on policing in Ireland before 1922. The Museum is staffed by a Sergeant and one civilian employee. Persons carrying out police related research can be facilitated at the Museum and Archives. Among the museum artefacts are photographs and documents outlining the history and development of policing in Ireland in the 19th/20th centuries. The Museum library contains a number of very interesting police-related publications.