Era
20th century
28
19th century
19
18th century
12
1900-1999
11
21st century
11
2000-2099
10
17th century
9
To 1500
8
Civil War, 1861-1865
7
1564-1616
6
1933-1945
6
1800-1899
5
1991-
5
Since 1991
5
16th century
4
1700-1799
4
1700-1899
4
1775-1865
4
1861-1865
4
Early church, ca. 30-600
4
Primitive and early church, ca. 30-600
4
1500-1699
3
1608-1674
3
1809-1849
3
1815-1861
3
1865-1950
3
354-430
3
Revolution, 1789-1799
3
To 1775
3
1225?-1274
2
1600-1699
2
1643-1715
2
1748-1793
2
1770-1850
2
1783-1809
2
1788-1824
2
1789-1799
2
1812-1870
2
1818-1848
2
1874-1963
2
1882-1941
2
1888-1985
2
1892-1973
2
1896-1940
2
1897-1962
2
1899-1973
2
1903-1946
2
1904-1980
2
1910-1946
2
1917-1967
2
more ...