Era
1917-1936
25
1917-
18
1894-1917
17
1953-
12
Revolution, 1917-1921
11
20th century
9
1870-1924
8
1801-1917
7
19th century
7
Nicholas II, 1894-1917
7
1878-1953
4
1936-1953
4
1991-
4
1855-1881
2
1894-1971
2
1904-1914
2
1933-1945
2
1953-1975
2
1689-1800
1
1718-1783
1
1828-1910
1
1861-1917
1
1872-1952
1
1879-1940
1
1882-1967
1
18th century
1
1912-1949
1
1917-1945
1
1918-
1
1927-
1
1945-
1
1945-1953
1
1949-
1
1950-
1
1975-
1
19th Century
1
Alexander II, 1855-1881
1
Revolution, 1789-1799
1