Other
20th century
56
19th century
42
1917-1963
29
1961-1963
27
1945-1989
21
1865-1950
19
1933-1945
17
1951-
17
1837-1901
13
1969-1994
13
1910-1921
10
1963-1969
10
Civil War, 1861-1865
9
18th century
8
1902-1976
8
1898-1951
7
To 1898
7
1775-1847
6
1873-1944
6
1874-1958
6
1933-
6
1969-
6
To 1775
6
To 1950
6
1775-1865
5
1861-1865
5
1925-1968
5
1989-
5
Colonial period, ca. 1600-1775
5
1783-1865
4
1815-1861
4
1865-
4
1865-1900
4
1870-1945
4
1882-1945
4
1901-1953
4
1908-1957
4
1922-
4
1950-
4
1981-1989
4
1634-1715
3
1775-1783
3
1783-1809
3
1789-1815
3
1809-1817
3
1853-1857
3
1881-1946
3
1888-1969
3
1891-1979
3
1908-1973
3
more ...