Era
20th century
72
Revolution, 1917-1921
55
19th century
41
1900-1999
33
1917-1921
24
17th century
21
1801-1917
19
18th century
19
1917-1936
13
1672-1725
12
1945-1991
12
1800-1899
10
1870-1924
10
16th century
9
1953-1985
9
1600-1699
8
1985-1991
8
Revolution, 1863-1864
8
1917 - 1921
7
1917-1921 (Révolution)
7
February Revolution, 1917
7
Peter I, 1689-1725
7
1812-1870
6
1813-1877
6
1899-1953
6
1945-1980
6
1991-
6
20e siècle
6
21st century
6
December Uprising, 1825
6
Nicholas II, 1894-1917
6
1613-1689
5
1700-1799
5
1729-1796
5
1746-1817
5
1800-1999
5
1867-1935
5
1868-1918
5
1533-1613
4
1613-1917
4
1689-1725
4
1825
4
1845-1894
4
1862-1911
4
1864-1918
4
1878-1953
4
1894-1917
4
1936-1953
4
Time of Troubles, 1598-1613
4
-1606
3
more ...