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
Radio City Tower fabric banner and illuminated light boxes. However, advertisements have only appeared infrequently, with Smirnoff and the Ford Motor Company being among the companies to have displayed advertisements there. In 2008 the framework was used for a banner during the European Capital of Culture celebrations. The roof is home to the local Digital Audio Broadcasting multiplex for Liverpool, but Radio City, Magic, and City Talk do not directly broadcast from the roof. The public are admitted to the viewing gallery daily, upon payment of an entry fee. Radio City Tower Radio City Tower (also known as St. John's Beacon) is a