Era
1939-1945
9
20th century
8
1917-
7
1900-1999
6
19th century
6
Since 1917
6
1800-1899
5
1917-1921
5
1855-1920
4
1865-1944
4
1873-1945
4
20e siècle
4
1885-1974
3
19e siècle
3
1055-1113
2
1600-1654
2
1600-1699
2
1722-1794
2
1767-1808
2
17th century
2
1800-1999
2
1811-1843
2
1814-1861
2
1832-1916
2
1842-1889
2
1861-1929
2
1866-1916
2
1866-1934
2
1873-1924
2
1876-1945
2
1880-1944
2
1888-1936
2
1890-1971
2
1891-1938
2
1895-
2
1896-
2
1896-1982
2
1902-1952
2
1903-1990
2
1907-1950
2
1908-
2
1914-1918
2
862-1240
2
Revolution, 1917-1921
2
Wars of 1918-1921
2
approximately 1594-1657
2
approximately 890-969
2
-1740
1
1832-1915
1
1856-1916
1
more ...