Era
1918-1945
244
20th century
233
1945-
196
1989-
129
1871-1918
117
21st century
105
19th century
87
1789-1900
73
18th century
65
1900-1999
63
Since 1989
61
1648-1715
55
17th century
47
Since 1945
45
2000-2099
44
476-1492
44
1789-1815
35
1648-1789
32
1933-1945
31
1848-1871
30
1492-1648
29
To 1500
27
1815-1848
26
1815-1871
25
1517-1648
24
1837-1901
21
Since 1900
19
16th century
18
1991-
16
Victoria, 1837-1901
13
1914-1940
12
1990-
12
1819-1901
10
1945-1989
10
1700-1799
9
1773-1859
9
1870-1940
9
1945-1990
9
1769-1821
8
1815-1898
8
1914-1945
8
1918-1933
8
Charles II, 1660-1685
8
1603-1714
7
1649-1660
7
1889-1945
7
1936-1945
7
1945-1953
7
1992-2010
7
Revolution, 1775-1783
7
more ...