Era
20th century
41
1900-1999
16
19th century
15
1951-
12
1800-1899
5
1865-1950
3
Civil War, 1861-1865
3
Since 1900
3
To 1863
3
1784-1870
2
1891-1934
2
1908-1960
2
1923-2006
2
1925-1963
2
1929-
2
1941-1950
2
1942-
2
1944-
2
1958-
2
1966-
2
To 1964
2
1809-1851
1
1856-1915
1
1861-1865
1
1863-1877
1
1865-1900
1
1873-1923
1
1909-2001
1
1911-1938
1
1922-2015
1
1923-1999
1
1940-2015
1
1941-1955
1
1957-
1
1960-
1
1963-1969
1
2005
1
Since 1951
1
To 1899
1