Era
20th century
294
21st century
143
19th century
104
1974-
66
1939-1975
52
1975-1982
39
1931-1939
33
1982-
28
1886-1931
26
18th century
26
1980-
26
1988-
26
2000-
23
1970-1973
21
1975-
20
1973-1988
19
Civil War, 1936-1939
15
16th century
13
17th century
13
1920-1970
13
1621-1665
11
1908-1973
11
Philip IV, 1621-1665
11
1946-1974
10
1945-
9
1605-1665
8
1810-1899
8
1959-1990
8
1991-
8
1806-1830
7
1810-
7
1817-1860
7
1824-1920
7
1973-
7
1989-
7
2002-
7
Wars of Independence, 1806-1830
7
1516-1700
6
1813-1833
6
1875-1885
6
1892-1975
6
1970-
6
To 1500
6
To 1810
6
1783-1830
5
1788-1808
5
1808-1814
5
1910-1946
5
1946-
5
1946-1970
5
more ...