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 Ballroom, making it in itself one of the most unique replica-like Towers in the world. It was also designed by the British architects Maxwell and Tuke who designed a number of towers including New Brighton. Other Eiffel-inspired towers are listed in the table in descending order of scale and height: These replicas are of unknown height. See also: 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