Era
20th century
451
1900-1999
243
19th century
181
21st century
171
2000-2099
100
1800-1899
80
18th century
64
17th century
55
1961-1970
37
To 1500
37
1899-1980
34
16th century
33
Civil War, 1861-1865
26
2001-2010
22
1700-1799
21
1800-1999
21
1945-
21
1900-2099
20
1971-1980
20
1991-2000
19
1564-1616
17
1939-1945
17
1600-1699
14
1931-1940
14
1861-1865
13
1951-1960
12
15th century
11
1900 - 1999
11
1945-1989
11
Colonial period, ca. 1600-1775
11
Since 1900
11
Since 1945
11
1933-1945
10
1700-1899
9
1946-
9
1981-1990
8
Geschichte
8
Since 2000
8
1843-1916
7
1951-
7
1989-
7
1990-
7
2000-
7
2002-
7
Early modern, 1500-1700
7
1500-1599
6
1809-1865
6
1941-1950
6
1950-
6
1969-1974
6
more ...