Era
20th century
81
21st century
33
19th century
18
1945-1989
8
1564-1616
7
18th century
7
1925-1995
7
To 1500
7
1889-1951
5
1818-1883
4
1933-1945
4
1945-
4
To 146 B.C.
4
1724-1804
3
1859-1941
3
1921-1997
3
1926-1984
3
2002-
3
To 500
3
1844-1900
2
1875-1961
2
1879-1955
2
1906-1975
2
1910-1921
2
1918-1933
2
1930-1992
2
1947-
2
1951-
2
1976-2002
2
Civil War, 1861-1865
2
Early modern and Elizabethan, 1500-1600
2
Revolution, 1775-1783
2
To 70 A.D.
2
-632
1
1017-1137
1
1122?-1204
1
1133-1189
1
1225?-1274
1
1268-1559
1
1304-1377
1
1397?-1468
1
1533-1592
1
1533-1917
1
1590-1657
1
1613-1917
1
1644-1912
1
16th century
1
1712-1778
1
1714-1762
1
1728-1814
1
more ...