Historical Period
20th century
260
19th century
85
21st century
40
18th century
22
To 1500
17
17th century
7
Empire, 30 B.C.-476 A.D.
7
To 146 B.C.
6
16th century
5
1934-
5
1945-
5
1945-1989
5
1985-
5
30 B.C.-476 A.D.
5
Civil War, 1861-1865
5
Colonial period, ca. 1600-1775
5
1801-1917
4
1912-1945
4
1971-
4
1978-1989
4
1993-
4
1879-1938
3
1889-1963
3
1900-1999
3
1948-
3
1950-
3
1984-
3
1989-1994
3
1990-
3
Federal Revolution, 1898-1899
3
Spanish colony, 1540-1810
3
1548-1820
2
1656-1680
2
1700-1799
2
1750-1815
2
1775-1865
2
1829-1871
2
1837-1911
2
1848-
2
1865-1921
2
1868-1912
2
1874-1938
2
1883-1945
2
1886-1955
2
1895-1971
2
1898-1946
2
1910-1943
2
1918-
2
1923-
2
1929
2
more ...