 Complete the following phrase:  The well-known painting The Kiss 1859 by the painter Francesco Hayez hides a reference to the Italian tricolour. Beyond the romantic subject, the work has a historical and political significance: Hayez, through the colours used the white of the dress, the red of the tights, the green of the lapel of the cloak and the blue of the womans dress, wants to represent the alliance that took place between Italy and France through the Plombières Agreement 21 July 1858, of a secret nature, which were the premise of the 