Era
1914-1944
178
20th century
150
1944-1989
117
1900-1999
98
1989-
60
1821-1914
58
Since 1989
50
19th century
38
1914-1945
37
1918-1945
36
1914-1918
32
1945-1989
26
1944-
25
1939-1945
24
1900 - 1999
21
1944 - 1989
20
To 1711
20
1866-1914
18
1914 - 1944
18
1940-1947
17
21st century
17
1882-1946
16
1821 - 1914
14
1914 - 1945
14
1882-1941
13
1945-1991
13
1800-1999
12
1914-1989
12
1918-1940
12
1945-
12
Ottoman Empire, 1288-1918
12
Since 1944
12
Charles I, 1866-1914
11
1288-1918
10
17th century
10
1821-1859
10
1933-1945
10
20e siècle
10
1917-1945
8
Since 1900
8
1600-1699
7
1711-1821
6
1801-1917
6
1839-1914
6
1918 - 1945
6
1919-
6
1944-1991
6
1991-
6
2000-2099
6
Great Union, 1918
6
more ...