Era
1945-
33
1917-1945
24
1894-1917
21
1953-1975
13
20th century
13
19th century
12
1801-1917
11
1801-1825
10
21st century
9
1945-1989
8
1953-
7
1989-
7
1871-1918
6
1953-1985
5
1985-1991
5
2000-2099
5
Nicholas II, 1894-1917
5
1861-1865
4
18th century
4
1955-
4
Ottoman Empire, 1288-1918
4
Revolution, 1917-1921
4
1288-1918
3
1689-1801
3
1789-1815
3
17th century
3
1800-1999
3
1825-1855
3
1837-1901
3
1855-1881
3
1894-1999
3
1933-1945
3
1946-
3
1965-
3
1971-
3
1975-
3
February Revolution, 1917
3
Mehmed V, 1909-1918
3
16th century
2
1769-1821
2
1784-1865
2
1800-1899
2
1801-1871
2
1801-1872
2
1815-1871
2
1821-1859
2
1873-1930
2
1894-1918
2
1900-1999
2
1901-1936
2
more ...