The original copy of this Eurovision was lost in a fire in the 1970s and no other copy has been found in any of the participating countries. Only the audio from the whole show has survived thanks to it being recorded from the radio broadcast.
Between the Swiss and the Belgian entries, a man jumped on stage carrying a banner with a protest against Spanish and Portugese dictatorships by Franco and Salazar. He was quickly taken off-stage by the security personnel. No footage exists of that nowadays, other than photographs of the moment, but in the audio broadcast the sounds of fight and struggle between the man and the people taking him away can be heard, as well as the people in the auditorium talking in confusion. The man's intention was to boycott Spanish performance, but he miscalculated and jumped on-stage one song too early, when the Belgian singer was about to perform. Since this incident, a rule was imposed on Spanish Television to broadcast each and every live international event with a delay of 15 seconds, so that they could cut out any similar protest against Franco's government and not let Spanish people see it. This practice would remain active on Spanish Television up until Franco's death and the arrival of democracy in the late 1970s.
At 16 years old, Gigliola Cinquetti was the youngest winner of the Eurovision Song Contest until 1986, when Sandra Kim, aged 13, won for Belgium.