Era
20th century
86
18th century
50
19th century
49
17th century
47
1748-1832
13
2001-2009
13
21st century
12
1989-
11
16th century
9
To 1500
7
1809-1865
6
1859-1952
6
1945-1989
6
1700-1799
5
1775-1783
5
1588-1679
4
1809-1882
4
1889-1976
4
1770-1831
3
1783-1809
3
1800-1899
3
1805-1859
3
1818-1883
3
1868-1963
3
1926-
3
1930-2002
3
1946-
3
1980-
3
Civil War, 1861-1865
3
Colonial period, ca. 1600-1775
3
Early modern, 1500-1700
3
1469-1527
2
1564-1642
2
1596-1650
2
1606-1665
2
1610-1684
2
1632-1677
2
1632-1704
2
1642-1727
2
1654-1716
2
1676-1761
2
1692-1756
2
1706-1790
2
1724-1804
2
1727-1760
2
1737-1809
2
1743-1826
2
1769-1854
2
1783-1865
2
1803-1882
2
more ...