[1] This was Udo Jürgens third consecutive entry in the contest, finally managing to score a victory for his native country.

The rule stating that a country could only sing in any of its national languages was created this year, possibly due to the 1965 Swedish entry which was sung in English.

[5] Also notable among the participants was Milly Scott, representing the Netherlands, who was the first black singer to compete in the Eurovision Song Contest.

[2] Following the confirmation of the eighteen competing countries, the draw to determine the running order of the contest was held on 13 January 1966.

During the Saturday afternoon rehearsal Modugno performed the new arrangement with three of his own musicians as opposed to the orchestra, which went over the three-minute time limit.

Following his rehearsal Modugno was confronted by the show's producers about exceeding the time limit and was asked to use the original arrangement with the orchestra.

[16] Each participating broadcaster appointed a spokesperson, connected to the contest venue via telephone lines and responsible for announcing, in English or French, the votes for their respective country.

Broadcasters were able to send commentators to provide coverage of the contest in their own native language and to relay information about the artists and songs to their television viewers.