Era
20th century
1,059
1900-1999
318
19th century
289
21st century
175
1945-
120
1800-1899
78
2000-2099
73
18th century
67
Since 1900
54
1970-
44
1800-1999
38
1980-
38
1918-1945
34
17th century
33
16th century
31
1900-2099
29
1945-1989
27
1971-
27
1989-
25
1945-1970
20
1933-1945
18
Civil War, 1861-1865
17
1900 - 1999
16
Early modern, 1500-1700
16
1960-1980
15
1564-1616
14
Since 1945
14
1700-1799
13
1865-1918
12
1783-1865
11
1917-1970
11
1961-1969
11
To 1500
11
1950-
10
1882-1941
9
1935-1977
9
2001-2009
9
Since 1970
9
1700-1899
8
1812-1870
8
1835-1910
8
1939-1945
8
1971-1980
8
1981-1989
8
Since 1989
8
1500-1700
7
1801-1917
7
1919-1933
7
1935-
7
1960-
7
more ...