Era
Early works to 1800
23
19th century
22
1809-1882
17
18th century
17
17th century
12
Paleozoic
12
1707-1778
10
16th century
9
1800-1899
9
From 2 million years ago
9
From 230 to 570 million years ago
9
Quaternary
9
1783-1840
8
20th century
8
1564-1642
7
1700-1799
6
1707-1783
6
1500-1599
5
1845-1923
5
18e siècle
5
Carboniferous
5
Cretaceous
5
1550-1617
4
1600-1699
4
1700-1899
4
1733-1804
4
1769-1859
4
1879-1955
4
1906-
4
1925-
4
1947-
4
973?-1048
4
Ottoman Empire, 1288-1918
4
Quaternaire
4
1288-1918
3
1473-1543
3
1501-1576
3
1514-1564
3
1571-1630
3
1642-1727
3
1700 - 1799
3
17e siècle
3
1800 - 1899
3
1800-1999
3
1810-1888
3
1826-1910
3
1840-1897
3
1888-1969
3
1893-
3
1907-
3
more ...