Era
20th century
209
21st century
119
19th century
73
18th century
33
1818-1883
26
17th century
19
To 1500
16
16th century
15
1970-
12
1975-
10
1982-
9
1988-
9
1974-
7
1939-1975
6
2008-
6
Civil War, 1936-1939
6
1864-1920
5
1927-1998
5
1973-1988
5
1980-
5
Medieval, 500-1500
5
1886-1931
4
1891-1937
4
1930-2002
4
2000-
4
15th century
3
1810-
3
1858-1917
3
1858-1918
3
1870-1924
3
1886-1939
3
1944-
3
1945-
3
1946-1974
3
1960-
3
1983-
3
1990-
3
1991-
3
Modern period, 1600-
3
To 1830
3
1797-1854
2
1824-1920
2
1847-1922
2
1870-1940
2
1871-1919
2
1879-1940
2
1906-1975
2
1919-1952
2
1924-1993
2
1929-
2
more ...