Período
20th century
435
21st century
433
Siglo XX
433
Siglo XI
297
Siglo XXI
136
1844-1900
11
Cambrian
3
Cretaceous
3
Neogene
3
Paleozoic
2
1651-1695
1
1723-1803
1
1727-1781
1
1796-1878
1
1803-1857
1
1836-1910
1
1859-1928
1
1869-
1
1869-1958
1
1875-1947
1
18th century
1
1921-2003
1
1924-2003
1
1927-2014
1
1929-1981
1
1931-2002
1
1946-1981
1
1969-1974
1
1981-
1
Carboniferous
1
Miocene
1
Proterozoic
1
Quaternary
1
Revolutionary period, 1868-1875
1
Siglo XVIII
1
To 1500
1