Era
1801-1917
70
19th century
38
20th century
33
Revolution, 1917-1921
14
18th century
10
1917-1945
10
1533-1917
9
To 1801
8
1800-1917
7
1800-1999
7
1801-1999
6
1861-1917
6
1900-1999
6
1904-1914
5
21st century
5
1700-1917
4
1800-1899
4
1801-1945
4
Alexander I, 1801-1825
4
To 1861
4
1613-1917
3
1936-1953
3
1786-1855
2
1860-1941
2
1917-1970
2
1952-
2
1953-1985
2
1985-1991
2
German occupation, 1941-1944
2
Nicholas II, 1894-1917
2
Revolution, 1905-1907
2
1600-1699
1
1613-1999
1
1700-1799
1
1729-1796
1
17th century
1
1800 - 1899
1
1801-1921
1
1801-1979
1
1821-1881
1
1828-1910
1
1842-1921
1
1855-1881
1
1860-1904
1
1866-1951
1
1875-1949
1
1880-1950
1
1888-1938
1
1894-1917
1
1900-2099
1
more ...