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| YEAR | DATE | EVENT | KING | PRIME MINISTER |
| 1861 | 17 march | Kingdom - dinasty Savoia | Vittorio Emanuele II King of Sardegna | Camillo Benso earl of Cavour |
| 1861 | 12 june | Bettino Ricasoli (I) | ||
| 1862 | 3 march | Urbano Rattazzi (I) | ||
| 1862 | 8 december | Luigi Carlo Farini | ||
| 1863 | 24 march | Marco Minghetti (I) | ||
| 1864 | 28 september | Alfonso Ferrero La Marmora | ||
| 1866 | 20 june | Bettino Ricasoli (II) |
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| YEAR | DATE | EVENT | KING | PRIME MINISTER |
| 1866 | 24 august | Union of the Veneto to Kingdom of Italy | ||
| 1867 | 10 april | Urbano Rattazzi (II) | ||
| 1868 | 27 october | Luigi Federico Menabrea |
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| YEAR | DATE | EVENT | KING | PRIME MINISTER |
| 1870 | 20 september | Union of the Papal State to Kingdom of Italy | ||
| 1869 | 14 december | Giovanni Lanza | ||
| 1873 | 10 july | Marco Minghetti (II) | ||
| 1876 | 25 march | Agostino Depretis (I) | ||
| 1878 | 9 january | Umberto I | ||
| 1878 | 24 march | Benedetto Cairoli (I) | ||
| 1878 | 19 december | Agostino Depretis (II) | ||
| 1879 | 14 july | Benedetto Cairoli (II) | ||
| 1881 | 29 may | Agostino Depretis (III) | ||
| 1887 | 29 july | Francesco Crispi (I) | ||
| 1891 | 6 february | Antonio Di Rudini (I) | ||
| 1892 | 15 may | Giovanni Giolitti (I) | ||
| 1893 | 15 december | Francesco Crispi (II) | ||
| 1896 | 10 march | Antionio Di Rudini (II) | ||
| 1898 | 29 june | Luigi Girolamo Pelloux | ||
| 1900 | 24 june | Giuseppe Saracco | ||
| 1900 | 29 july | Vittorio Emanuele III | ||
| 1901 | 15 february | Giuseppe Zanardelli | ||
| 1903 | 3 november | Giovanni Giolitti (II) | ||
| 1905 | 16 march | Tommaso Tittoni | ||
| 1905 | 28 march | Alessandro Fortis | ||
| 1906 | 8 february | Giorgio Sydney Sonnino (I) | ||
| 1906 | 29 may | Giovanni Giolitti (III) | ||
| 1909 | 11 december | Giorgio Sydney Sonnino (II) | ||
| 1910 | 31 march | Luigi Luzzati | ||
| 1911 | 30 march | Giovanni Giolitti (IV) | ||
| 1914 | 21 march | Antonio Salandra | ||
| 1916 | 18 june | Paolo Boselli | ||
| 1917 | 30 october | Vittorio Emanuele Orlando |
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| YEAR | DATE | EVENT | KING | PRIME MINISTER |
| 1918 | 3 november | Union of Trentino, Alto Adige and Friuli to Kingdom of Italy | ||
| 1919 | 23 june | Francesco Saverio Nitti | ||
| 1920 | 15 june | Giovanni Giolitti (V) | ||
| 1921 | 4 july | Ivanoe Bonomi (I) | ||
| 1922 | 26 february | Luigi Facta | ||
| 1922 | 31 october | Benito Mussolini | ||
| 1943 | 25 july | mar. Pietro Badoglio | ||
| 1944 | 18 june | Ivanoe Bonomi (II) | ||
| 1945 | 19 june | Ferruccio Parri | ||
| 1945 | 11 december | Alcide De Gasperi | ||
| 1946 | 9 may | Umberto II |