The Marconi Corporation has donated an unrivalled collection of wireless artefacts to Oxford University, including the microphone used by Dame Nellie Melba during the world's first live broadcast recital in 1920. The collection also includes telegraphs sent during the sinking of the Titanic in 1912. Guglielmo Marconi sent the first wireless radio signal in 1895 and the first transatlantic message in 1901