Era
20th century
69
20TH CENTURY
47
19TH CENTURY
39
21st century
32
19th century
24
18TH CENTURY
20
15TH CENTURY
16
1945-
15
16TH CENTURY
14
17TH CENTURY
10
1989-
7
1884-1972
6
18th century
6
1947-
5
1969-1974
5
1960-
4
1974-
4
1776-1837
3
17th century
3
1818-1883
3
1834-1917
3
1858-1917
3
1902-
3
13TH CENTURY
2
14TH CENTURY
2
1728-1779
2
1741-1803
2
1864-1901
2
1864-1920
2
1867-1931
2
1869-1940
2
1884-1944
2
1884-1962
2
1898-1986
2
1901-1976
2
1905-1980
2
1913-1960
2
1922-2008
2
1924-
2
1928-
2
1945-1989
2
1949-
2
1958-
2
1966-
2
1969-
2
1981-
2
1997-
2
Civil War, 1861-1865
2
Medieval period, 1066-1485
2
Revolution, 1789-1799
2
more ...