Era
20th century
1,230
1900-1999
616
19th century
393
21st century
331
2000-2099
153
1945-
146
1800-1899
139
18th century
131
1989-
127
1945-1989
126
Since 1945
78
2001-2009
70
1946-
69
1933-1945
64
1800-1999
63
17th century
59
1951-
57
Since 1900
56
1900-2099
53
Civil War, 1861-1865
50
1865-1950
40
1981-1989
36
1700-1799
35
1979-1997
35
To 1500
32
1837-1901
30
1858-1919
30
1980-
30
1700-1899
28
2009-2017
28
16th century
27
1900 - 1999
27
Since 1989
26
1969-1974
25
Revolution, 1775-1783
22
Since 1951
22
1861-1865
21
1918-1945
20
1960-1980
19
1945-1964
18
1997-
18
2017-
18
Since 1865
18
Since 1980
18
1882-1945
17
1910-1936
17
1775-1865
16
1729-1797
15
1865-
15
Since 2000
15
more ...