Era
19th century
78
Early works to 1800
67
20th century
64
18th century
38
21st century
32
Mesozoic
25
Precambrian
23
17th century
22
1657-1727
19
1800-1899
17
Paleozoic
17
1900-1999
14
1594-1674
13
16th century
12
Proterozoic
12
To 1500
12
Wars of Independence, 1810-1821
12
Tertiary
11
2000-2099
10
19e siècle
9
1561-1626
8
Cretaceous
8
Pleistocene
7
-1695
6
20e siècle
6
To 146 B.C.
6
d. 1695
6
1700-1799
5
1749-1832
5
1750-1831
5
1800-1999
5
1860-1890
5
1865-
5
1960-
5
Civil War, 1960-1965
5
From 65 to 230 million years ago
5
Mésozoïque
5
Paléozoïque
5
Quaternary
5
1626-1712
4
1632-1723
4
1649-1660
4
2001-2009
4
Cambrian
4
Civil War, 1861-1865
4
Commonwealth and Protectorate, 1649-1660
4
Devonian
4
From 230 to 570 million years ago
4
From 570 million to 5 billion years ago
4
Permian
4
more ...