Era
20th century
32
21st century
17
19th century
11
1935-2020
9
1900-1999
8
1909-2005
8
1945-1989
8
1989-
8
2000-2099
8
2001-2009
8
1946-
6
1800-1999
5
1874-1922
4
1890-1969
4
1980-
4
2000-
4
2009-2017
4
356 B.C.-323 B.C.
4
Civil War, 1861-1865
4
1564-1616
3
17th century
3
1880-1959
3
1917-1963
3
1932-
3
1936-
3
1941-
3
1953-1961
3
1955-2011
3
1956-
3
1960-
3
1981-1989
3
1469-1527
2
1732-1799
2
1775-1783
2
1800-1899
2
1808-1889
2
1809-1865
2
1815-1898
2
1859-1941
2
1864-1920
2
1865-1918
2
1865-1921
2
1865-1933
2
1871-1933
2
1884-1962
2
18th century
2
1915-
2
1919-2013
2
1934-
2
1935-
2
more ...