Era
19th century
45
Early works to 1800
20
Quaternary
19
Cenozoic
15
1785-1851
14
Pleistocene
14
18th century
13
From 2 million years ago
13
20th century
11
From 10 thousand to 2 million years ago
8
17th century
7
1900-1999
7
1930-
7
From 65 million years ago
7
Mesozoic
7
1800-1899
6
1725-1803
5
From 65 to 230 million years ago
5
Holocene
5
Neogene
5
Pliocene
5
1522-1605?
4
1707-1788
4
1790-1874
4
1796-1843
4
Pléistocène
4
To 1500
4
1600-1799
3
1753-1828
3
1804-1881
3
1831-1881
3
1884-1937
3
1890-1985
3
1894-1953
3
1943-
3
1945-
3
19e siècle
3
2000-2099
3
Eocene
3
From 2 to 10 million years ago
3
From 2 to 25 million years ago
3
Old English, ca. 450-1100
3
Paleocene
3
Paleogene
3
-1906
2
1700 - 1799
2
1700-1799
2
1716-1799
2
1755-1830
2
1787-1874
2
more ...