Era
20th century
44
19th century
13
21st century
12
1929
4
Civil War, 1861-1865
4
18th century
3
1945-
3
2011
3
1533-1917
2
1564-1616
2
1917-1991, Soviet Union
2
1925-1953
2
1931-
2
1933-1945
2
1944-1989
2
Alexander I, 1801-1825
2
Alfonso XIII, 1886-1931
2
German occupation, 1940-1945
2
-1400
1
-1852
1
-1853
1
1032-1499
1
13th century
1
1421-1737
1
1478-1535
1
1533-1597
1
1545-1561
1
1556?-1623
1
1585-1596
1
1651-1695
1
1664-1754
1
1693?-1756
1
16th century
1
1714-1837
1
1743-1803
1
1769-1821
1
1775-1817
1
1801-1917
1
1805-1882
1
1815 or 1816-
1
1821-1880
1
1821-1881
1
1828-1910
1
1832-1919
1
1834-1898
1
1853-1876
1
1854-1897
1
1859-1929
1
1865-1877
1
1867-1957
1
more ...