A large ballroom and a hotel were attached to the new variety theatre, and it was already able to use electric light, and included promenades and a conservatory.
[5] From 1928, the then Austrian radio, the RAVAG, was leased for a few years in parts of the Ronacher and broadcast its music programs from there: First, the so-called "Parisien" was converted into a studio, which was used together with ancillary rooms and the entire third floor.
[6] After the Anschluss in 1938, the theatre passed from its previous co-owner Samuel Schöngut to Bernhard Labriola through Aryanization.
[7][8] Schöngut was deported to the Litzmannstadt ghetto on 2 November 1941 and from there to the Auschwitz concentration camp on 16 August 1944, where he was murdered.
Subsequently, vaudeville artists performed again, before the Austrian television used the premises for TV productions from 1960 onwards.
[6] After several years as a guest performance hall for international productions and festive events, the Ronacher was expanded into a musical stage at a cost of 46.9 million euros.
[10] The extension of the building by the architect Günther Domenig was carried out despite massive political and cityscape protection concerns.