Era
1918-1945
252
20th century
239
1945-
201
1989-
132
1871-1918
122
21st century
110
19th century
89
1789-1900
77
1900-1999
68
18th century
65
Since 1989
64
1648-1715
55
17th century
48
2000-2099
48
476-1492
48
Since 1945
48
1789-1815
36
1648-1789
35
1848-1871
34
1815-1848
30
1933-1945
30
1492-1648
29
1815-1871
29
To 1500
28
1517-1648
27
1837-1901
21
16th century
20
Since 1900
20
1991-
16
1990-
13
Victoria, 1837-1901
13
1914-1940
12
1945-1989
11
1819-1901
10
1700-1799
9
1773-1859
9
1870-1940
9
1918-1933
9
1945-1990
9
1769-1821
8
1815-1870
8
1815-1898
8
1889-1945
8
1914-1945
8
Charles II, 1660-1685
8
1603-1714
7
1649-1660
7
1800-1899
7
1936-1945
7
1945-1953
7
more ...