Era
20th century
2,252
19th century
1,378
1900-1999
625
1800-1899
322
21st century
249
18th century
182
Colonial period, ca. 1600-1775
155
1783-1850
130
1800-1999
93
2000-2099
86
Revolutionary period, 1775-1783
79
1803-1882
63
Civil War, 1861-1865
60
1900-2099
59
17th century
52
1819-1891
44
1900 - 1999
44
1865-
41
1783-1865
39
1700-1899
33
1843-1916
32
1817-1862
29
1874-1946
29
1804-1864
28
1819-1892
27
1811-1896
24
Early modern, 1500-1700
22
1800 - 1899
21
1882-1941
21
Revolution, 1775-1783
21
1835-1910
20
1830-1886
19
1888-1965
19
1865-1918
18
1908-1960
18
1809-1849
17
1899-1961
17
1564-1616
16
Since 1865
16
1897-1962
15
1600-1899
14
1922-1969
14
1924-1987
14
1600-1799
13
1800-2099
13
Geschichte
13
1600-1775
12
1868-1963
12
1896-1940
12
1926-1997
12
more ...