Era
20th century
11
18th century
6
1961-1969
6
19th century
5
1806-1873
4
1969
4
Revolution, 1775-1783
4
1724-1804
3
21st century
3
Civil War, 1861-1865
3
1770-1831
2
1775-1783
2
1783-1865
2
1815-1902
2
1820-1906
2
1901-1953
2
1933-1945
2
1973-
2
To 1775
2
-1536
1
-233 B.C.
1
13017 Liberty
1
1331-1406
1
1463-1494
1
1469-1527
1
1497-1560
1
1588?-1653
1
1596-1650
1
1632-1704
1
1644-1718
1
1689-1755
1
16th century
1
1710-1796
1
1723-1790
1
1735-1826
1
1743-1826
1
1763-1867
1
1770-1827
1
17th century
1
1804-1863
1
1833-1911
1
1834-1904
1
1842-1910
1
1849-1887
1
1882-1945
1
1889-1951
1
1889-1976
1
1904-
1
1905-1980
1
1912-1994
1
more ...