Era
2004
105
1749-1832
70
Early works to 1800
54
20th century
48
17th century
46
1806-1873
33
21st century
32
1910-1997
31
Holocene
25
1900-1999
24
2010
22
Quaternary
22
19th century
16
From 10 thousand years ago
14
From 2 million years ago
14
18th century
11
Cenozoic
11
1848-1922
8
1947-
8
2000-2099
8
Pleistocene
7
1856-1940
6
1897-1983
6
1903-
6
1945-
6
Civil War, 1861-1865
6
2000 - 2099
5
Cretaceous
5
From 10 thousand to 2 million years ago
5
Mesozoic
5
1731-1808
4
1900 - 1999
4
1975-
4
2011
4
20e siècle
4
Devonian
4
Kindai
4
-1998
3
1640
3
1647
3
1658-1730
3
1700-1799
3
1752-1813
3
1797-1878
3
1800-1899
3
1861-1865
3
1877-1962
3
1886-1954
3
1888-1957
3
1909-1991
3
more ...