Era
20th century
174
19th century
111
1900-1999
90
21st century
54
1800-1899
42
2000-2099
35
To 1859
25
30-600
19
1898-1963
16
18th century
14
1951-
14
Early church, ca. 30-600
14
17th century
13
16th century
12
1800-1999
11
1815-1861
10
1939-1945
10
1886-1968
9
1945-
9
1783-1865
8
Primitive and early church, ca. 30-600
8
To 1848
8
1848-1860
7
1934-
7
Middle Ages, 600-1500
7
1225?-1274
6
1483-1546
6
1509-1564
6
1564-1616
6
1600-1699
6
1795-1849
6
1813-1855
6
1859-1950
6
Miocene
6
Since 1900
6
Tertiary
6
To 1500
6
1500-1599
5
1700-1799
5
1703-1791
5
1802-1847
5
1900-2099
5
Civil War, 1861-1865
5
1846-1850
4
1881-1956
4
1894-
4
1901-
4
1913-2007
4
1929-1968
4
1931-
4
more ...