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 replicas and derivatives Eiffel Tower replicas and derivatives As one of the most iconic and recognisable structures in the world, the Eiffel Tower has been the inspiration for the creation of over 50 similar towers around the world. Most are not exact replicas, though there are many like it. The Eiffel Tower was an inspiration for the Blackpool Tower in Blackpool, England, which proved that a tower could be a profitable tourist attraction. The Blackpool Tower was originally the idea of the Standard Contract and Debenture Corporation, based in the Isle of Man, who proposed the erection of two towers, one in Blackpool