Era
20th century
20
21st century
9
1899-1992
8
To 500
5
1723-1790
3
18th century
2
1600-1750
1
1632-1694
1
16th century
1
1835-1917
1
1838-1917
1
1839-1897
1
1905-1989
1
1907-1995
1
1911-1991
1
1918-1945
1
1918-1989
1
1918-2015
1
1945-
1
1949-
1
1974-2009
1
1976-2000
1
1976-2002
1
1990-
1
1991-
1
19th century
1
2000-
1
2002-
1
510-30 B.C.
1
To 146 B.C.
1
To 1500
1
Union, 1707
1