[1] On 27–29 January 1966, "Dio, come ti amo" competed in the 16th edition of the Sanremo Music Festival performed by both Modugno and Gigliola Cinquetti, and winning the competition.

[1] On 5 March 1966, the Eurovision Song Contest was held at Villa Louvigny in Luxembourg hosted by the Compagnie Luxembourgeoise de Télédiffusion (CLT), and broadcast live throughout the continent.

Modugno performed "Dio, come ti amo" fourteenth on the evening, following Monaco's "Bien plus fort" by Téréza and preceding France's "Chez nous" by Dominique Walter.

During rehearsals, mere hours before the live contest, Modugno performed the new arrangement with three of his own musicians as opposed to the orchestra, which went over the three minute time limit.

[4][5] At the close of voting, the song had received nul points (zero), for the first and also the only time in Italian Eurovision history, placing seventeenth (equal last) in a field of eighteen.