22 FLORENCE 21 and september 1864 Old Bridge: celebrations with fireworks to Florence; vital new of Italy. The 15 september 1864 were signed to Paris a convention; between the reign d ? Italy and the France; in which it settled that l ? Italy renounced to vital Rome and France would have withdrawn; within two years; its truppe from Rome. This convention contained but a secret article; with which l ? Italy s ? it engaged to transfer; in definitive way; the vital one from Turin in ? an other city. A commission; presided from prince Eugene di Carignano; the 18 september; decidette that Florence was the city more apt to become the vital new of the reign d ? Italy.