text: As national broadcasters join and leave the Eurovision feed transmitted by the EBU, the EBU/Eurovision network logo ident (not to be confused with the logo of the song contest itself) is displayed. The accompanying music (used on other Eurovision broadcasts) is the Prelude (Marche en rondeau) to Marc-Antoine Charpentier's Te Deum. Originally, the same logo was used for both the Eurovision network and the European Broadcasting Union, but they now have two different logos; the latest Eurovision network logo was introduced in 2012, and when the ident is transmitted at the start and end of programmes it is this Eurovision network logo that appears.
  The EBU now holds the recordings of all but two editions of the contest in its archives, following a project initiated in 2011 to collate footage and related materials of all editions ahead of the event's 60th edition in 2015. Although cameras were present to practice pan-European broadcasting for the first contest in 1956 to the few Europeans who had television sets, its audience was primarily over the radio. The only footage available is a Kinescope recording of Lys Assia's reprise of her winning song. No full recording of the  exists, with conflicting reports of the fate of any copies that may have survived. Audio recordings of both contests do, however, exist, and some short pieces of footage from both events have survived. Until 2004, the host broadcaster owned the copyright of the contest that they produced, with the EBU owning the copyright of all subsequent editions.
  Expansion of the contest
  From the original seven countries which entered the first contest in 1956, the number of competing countries has steadily grown over time. 18 countries participated in the contest's tenth edition in 1965, and by 1990, 22 countries were regularly competing each year.