Era
19th century
24
20th century
23
1900 - 1999
11
1800-1899
9
1800 - 1899
7
1832-1886
6
1900-1999
6
21st century
5
1800 - 1999
4
1946-1974
4
1970-
4
Since 1970
4
1700-1799
3
1800-1999
3
18th century
3
1700 - 1799
2
17th century
2
1900-2099
2
1962-2003
2
Tertiary
2
1600-1699
1
16th century
1
1812-1872
1
1815-1899
1
1822-1895
1
1827-1875
1
1838-1889
1
1840 - 1841
1
1840-1841
1
1843-1909
1
1853-1889
1
1858-1940
1
1870-1930
1
1883-1950
1
1900 - 2099
1
1909-
1
1911
1
1918-1970
1
1946 - 1974
1
1946-
1
1946-1989
1
1961-
1
2000 - 2099
1
2002
1
From 2 to 65 million years ago
1
Revolution, 1840-1841
1
Since 1900
1
Since 1918
1
Sozialgeschichte 1575-1700
1
To 1830
1