Eiffel Tower In 1909, a permanent underground radio centre was built near the south pillar, which still exists today. On 20 November 1913, the Paris Observatory, using the Eiffel Tower as an aerial, exchanged wireless signals with the United States Naval Observatory, which used an aerial in Arlington, Virginia. The object of the transmissions was to measure the difference in longitude between Paris and Washington, D.C. Today, radio and digital television signals are transmitted from the Eiffel Tower. A television antenna was first installed on the tower in 1957, increasing its height by 18.7 m (61.4 ft). Work carried out in 2000
Eiffel Tower (Delaunay series) had announced a plan to sell 150 copies of the book, which would equal in height the Tower itself. The Russian film director Sergei Eisenstein's appreciation of Delaunay's work informed his Soviet montage theory, as he imagined developing cinematically "a dynamic fusion of a series, moving past the spectator, of those hundred views of the Eiffel Tower" rather than a "summation within a single canvas". Cendrars's 1924 essay on Robert Delaunay describes his feminization of the Tower, and Sonia Delaunay described the Eiffel Tower as her husband's "Eve future" Eiffel Tower (Delaunay series) The Eiffel Tower series of Robert Delaunay