Ireland's RTÉ National Symphony Orchestra is the concert music orchestra of Radio Television Ireland. Formerly the National Symphony Orchestra of Ireland, the ensemble began with the formation of a national radio channel, based in Dublin, in 1926. The station hired staff musicians, who often played together on the radio and in concert as a chamber orchestra. String players from the radio, wind players from the Army School of Music, and other musicians played as the Dublin Philharmonic Society under the direction of Col. Fritz Brase, head of the Army School from 1927.
In 1947, the broadcasting authority, now called Radio Éireann (Radio Ireland), expanded its orchestra by opening its membership to musicians from all over Europe and renaming the group the Radio Éireann Symphony Orchestra. Its initial conductor was Captain Michael Bowles. After he retired in 1948 (he had been conducting the small predecessor or the RÉSO for several years), the new orchestra drifted without a permanent conductor, but played for such major conductors as Jean Martinon and Hans Schmidt-Isserstedt. Finally in 1953, the orchestra found a principal conductor in Milan Horvat, who remained until 1961. In that year, Ireland added television to its broadcasting service. The name of the government body (in English) established by a new broadcasting act in 1960 was the Irish National Public Service Broadcasting Organisation, and the on-air service now became Raidió Teilifís Éireann (RTÉ). The orchestra became known as the RTÉ Symphony Orchestra. By now it was, de facto, the national orchestra of Ireland and the main city orchestra of Dublin. Its new chief conductor from 1962 was Tibor Paul. He was succeeded by Albert Rosen, Colman Pierce, Bryden Thomson, and Jànos Fürst.
In 1981, it found a new concert home when the National Concert Hall opened in Dublin. At about the same time, it expanded its broadcasting activities. Until 1979, RTÉ had run only one radio channel and one television channel. In 1979, it established more channels, including an arts station called FM3, which aired numerous concerts by the RTÉSO. In 1989, the orchestra was expanded to the size of a large symphony orchestra, and it was renamed the National Symphony Orchestra of Ireland. Its new principal conductor was George Hurst. Kaspar de Roo took that position in 1994, followed by Alexander Anissimov and Gerhard Markson. In 2005, the orchestra changed names again, becoming officially the RTÉ National Symphony Orchestra. As of 2018 the principal conductor post was vacant, but Nathalie Stutzmann was under contract as principal guest conductor, and the orchestra had a large roster of world-class guest conductors to draw on.