Era
20th century
50
1900-1999
22
19th century
14
Revolution, 1917-1921
13
1939-1945
12
21st century
12
17th century
11
1672-1725
10
18th century
8
1900 - 1999
7
1929-1945
7
1919-2001
6
1945-1991
6
2000-2099
6
1878-1935
5
1985-1991
5
1300-1700
4
1840-1893
4
Peter I, 1689-1725
4
1600-1699
3
1606-1669
3
1689-1725
3
1800-1899
3
1800-1999
3
1828-1910
3
1884-1942
3
1917-1936
3
1933-
3
1940-1996
3
1960-
3
1991-
3
German occupation, 1940-1945
3
1500-1800
2
1530-1584
2
1564-1616
2
1589-1626
2
1600-1799
2
1689-1725 (Pierre Ier)
2
1774-1840
2
1799-1837
2
17e siècle
2
1801-1917
2
1814-1876
2
1833-1895
2
1860-1904
2
1868-1936
2
1872-1929
2
1881-1894
2
1888-1944
2
1903-1996
2
more ...