Era
20th century
56
19th century
53
1800-1850
19
1809-1865
15
21st century
13
1861-1865
10
1800-1899
9
1929-1968
9
1850-1900
8
1900-1999
8
1815-1861
7
1732-1799
6
1783-1865
6
1945-1989
6
2000-2099
6
1775-1783
5
18th century
5
1989-
5
1865-1933
4
1882-1945
4
1913-1994
4
1933-1945
4
1936-1996
4
2009-2017
4
Since 2000
4
1800
3
1858-1919
3
1865-1950
3
1925-1965
3
1981-1989
3
Civil War, 1861-1865
3
Revolution, 1775-1783
3
To 1865
3
1700-1899
2
1775-1865
2
1782-1852
2
1783-1809
2
1795-1859
2
1797
2
1810-1892
2
1813-1861
2
1818-1895
2
1856-1924
2
1865-1918
2
1890-1969
2
1913-1921
2
1917-1963
2
1953-1961
2
19e siècle
2
2001-2009
2
more ...