Era
20th century
257
1900-1999
98
19th century
49
Civil War, 1861-1865
42
21st century
26
1564-1616
17
1899-1961
15
1800-1899
13
Early modern, 1500-1700
12
18th century
11
1861-1865
10
1900 - 1999
9
1900-2099
9
1914-1918
9
To 1500
8
16th century
6
1800-1999
6
1842-1914?
6
1939-1945
6
1945-1989
6
Civil War, 1936-1939
6
17th century
5
1882-1941
5
Early modern and Elizabethan, 1500-1600
5
1608-1674
4
1819-1891
4
1819-1892
4
1897-1962
4
1946-
4
Revolution, 1789-1799
4
1520?-1604
3
1560-1612
3
1572-1631
3
1573?-1637
3
1879-1955
3
Civil War, 1642-1649
3
Middle English, 1100-1500
3
Old English, ca. 450-1100
3
To 146 B.C.
3
active 15th century
3
1185-1868
2
1500-1599
2
1500-1799
2
1603-1714
2
1618-1658
2
1621-1678
2
1627-1656
2
1800 - 1899
2
1800-1815
2
1800-2099
2
more ...