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On 23 January 1955 the privately owned Compagnie Luxembourgeoise de Télédiffusion (CLT) launched Luxembourg's first television channel, the French-language Télé Luxembourg.
CLT had on 1 July 1954 changed its name from the earlier Compagnie Luxembourgeoise de Radiodiffusion (CLR), founded in 1931.
In 1997, CLT merged with the Bertelsmann subsidiary UFA Film- und Fernseh GmbH, based in Hamburg, Germany, to create CLT-UFA.
In 2000, CLT-UFA merged with Pearson Television and became part of the RTL Group, with its headquarters at Kirchberg, Luxembourg.