Radiotelevisiun Svizra Rumantscha (RTR, English: Radio-Television Romansh Swirzerland or Swiss Romansh Radio-Television) (formerly known as Radio e Televisiun Rumantscha (English: Romansh Radio and Television)) is a Swiss broadcasting company (part of SRG SSR) which offers programming to Romansh-speakers in Switzerland and around the world. The first radio program in Romansh was broadcast on 17 January 1925. The person responsible for this broadcast was Felix Huonder. Regular Romansh programming began in 1943. Las Cristallas, the Romansh "radioscola" (radio school, or lectures delivered by radio broadcast), premiered on 27 January 1955. Balcun Tort, the first television program in Romansh, was broadcast on 17 February 1963. This commemorated the 25th anniversary of Romansh's becoming Switzerland's fourth national language.