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
Tower Music (Joseph Bertolozzi) precursor to the "Tower Music" project was "Bridge Music". Not thinking he could gain access to the Eiffel Tower, Bertolozzi went about creating a composition made using only the unmodified sounds of New York's Mid-Hudson Bridge, for the Hudson-Fulton-Champlain Quadricentennial celebrations in 2009. Bertolozzi used "Bridge Music" as a proof of concept to present to SETE, the authority that controls the Eiffel Tower. By 2010, plans were underway to attempt field recording and a live performance on the Eiffel Tower. After a formal meeting with SETE in November 2010, the project was approved in March 2011. In January 2013, Bertolozzi