Annexation to Piedmont having been voted by plebiscite and the opposition of Napoleon III.
The new constitution was promulgated on the 15th of December 1799 and in a plebiscite held during January 1800 it received the support of 3,011,007 voters, only 1562 persons voting against it.
Its utterances (plebiscite) had the full force of law; it elected the tribunes of the plebs and the plebeian aediles, and it pronounced judgment on the penalties which they proposed.
Obliged to leave the city in 1848, he was restored by the Austrians in 1849; ten years later, on the 10th of August 1859, the representatives of Modena declared their territory part of the kingdom of Italy, and their decision was confirmed by the plebiscite of 1860.
The date of the plebiscite was fixed originally for June II 1920.