Era
20th century
82
19th century
38
1822-1913
18
1799-1883
7
1900-1999
7
1954-
7
21st century
7
1867-1957
6
1897-1937
6
Civil War, 1861-1865
5
-1617
4
1799-1847
4
1860-1926
4
1863-1954
4
1929-1945
4
1940-1994
4
1964-
4
1972-
4
1980-
4
d. 1617
4
1412-1431
3
1533-1603
3
17th century
3
1800-1899
3
1832-1888
3
1844-1926
3
1867-1934
3
1876-1938
3
1896-1926
3
1897-1993
3
18th century
3
1907-1964
3
1927-2006
3
1946-
3
1949-
3
1981-
3
Charles VII, 1422-1461
3
Colonial period, ca. 1600-1775
3
Elizabeth, 1558-1603
3
Revolution, 1775-1783
3
1580-1631
2
1647-1717
2
1800-1885
2
1811-1896
2
1820-1910
2
1849-1924
2
1904-1971
2
1906-
2
1906-1975
2
1910-1985
2
more ...