Whether the imposing silhouette of the Lilas Tower, the Lyon-Fourvière or Strasbourg sites integrated into the urban fabric, or high-altitude installations such as Mont Ventoux, Puy de Dôme or La Rhune, these structures mark the horizon. They punctuate people's habits, accompany their movements, and become part of their daily lives, to the point of becoming familiar landmarks. Construction of the main network transmitters began in 1950. These essential infrastructures enabled the first television channels to be broadcast throughout France, ushering in a new era in the history of the media.