Era
20th century
204
1900-1999
121
19th century
116
1800-1899
62
1900 - 1999
61
Civil War, 1861-1865
36
21st century
33
1800 - 1899
32
1783-1865
27
1861-1865
26
1868-1963
24
18th century
24
20e siècle
24
Early accounts to 1600
23
Since 1900
23
20e siècle
18
1783-1850
17
1809-1865
17
1945-
17
Colonial period, ca. 1600-1775
15
1800-1999
14
1865-1918
14
1918-1945
14
2000-2099
14
1861 - 1865
13
1900-2099
12
1945-1989
11
19e siècle
11
Early works to 1800
11
Revolution, 1775-1783
11
1800-1859
10
1946-
10
19e siècle
10
16th century
9
1970-
9
1989-
9
1775-1783
8
1783-1899
8
1838-1918
8
1929-1968
8
2001-2009
8
1743-1826
7
1800 - 1999
7
21e siècle
7
Since 1945
7
1700-1899
6
1775-1865
6
1783 - 1899
6
1818-1895
6
1872-1934
6
more ...