Warsaw radio mast

The Warsaw radio mast (Maszt radiowy w Konstantynowie, lit. 'Konstantynów radio mast') was a radio mast located near Gąbin, Poland, and was the world's tallest structure at 646.30 m (2, 120 ft) from 1974 until its collapse on 8 August 1991. The mast was designed with extreme height to broadcast Polish state media around the world, including to parts of Canada and the United States, and even reaching Antarctica. The official name of the facility was Radiofoniczny Ośrodek Nadawczy w Konstantynowie (Radiophonic Transmission Centre Konstantynów), Radiowe Centrum Nadawcze w Konstantynowie (Radio Transmission Centre Konstantynów, RCN Konstantynów) or Warszawska Radiostacja Centralna (WRC) w Gąbinie (Warsaw Central Radio Station Gąbin). It broadcast Polskie Radio's Program I (unofficially referred to as "Jedynka"). Designed by Jan Polak, its construction started with earthworks for the foundations on 5 July 1969, while construction of the tower itself began on 18 October 1972 with a ceremony, and was completed on 18 May 1974. Its transmitter, whose installation started in October 1973, entered regular service on 22 July 1974. The opening of the mast was met with extensive celebration and was covered by the Polish Film Chronicle. The tower was used by Warsaw Radio-Television (Centrum Radiowo-Telewizyjne) for radio broadcasting on a frequency of AM-LW (longwave) 227 kHz before 1

Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).