Era
20th century
140
21st century
71
17th century
49
1989-
34
19th century
27
To 1500
14
1945-1989
13
1900-1999
10
1945-
10
1780-1831
9
18th century
9
Civil War, 1861-1865
9
1603-1714
8
Charles I, 1625-1649
8
Civil War, 1642-1649
8
2001-2009
7
To 500
7
1995-2005
6
2001-
5
To 146 B.C
5
1660-1688
4
World War, 1914-1918
4
1487
3
1924-
3
1945-1953
3
1949-
3
1990-
3
1991-
3
1993-
3
1997-
3
2000-2099
3
Charles II, 1660-1685
3
Commonwealth and Protectorate, 1649-1660
3
Medieval, 500-1500
3
active 6th century B.C
3
1567-1625
2
1584-1647
2
1649-1660
2
1689-1714
2
1851-1929
2
1904-1980
2
1914-1918
2
1946-
2
1947-
2
1969-1994
2
1976-
2
1979-
2
1981-1989
2
2000 - 2099
2
2009-
2
more ...