Era
20th century
109
19th century
19
1898-1951
18
1951-
16
21st century
11
1858-1919
6
18th century
5
Revolution, 1775-1783
5
1775-1865
4
1882-1947
4
1929
4
Civil War, 1861-1865
4
Colonial period, ca. 1600-1775
4
To 1898
4
1822-1885
3
1901-1953
3
1592-1672
2
1757-1804
2
17th century
2
1822-1903
2
1865-1898
2
1885-1976
2
1892-1951
2
1892-1969
2
1899-1932
2
1902-1967
2
1921-1930
2
1926-1966
2
1945-1989
2
1946-
2
1949-
2
1951-1960
2
1988
2
Conspiracy of 1741
2
Revolution, 1959
2
-1980
1
1564-1616
1
1580-1638
1
1620-1655
1
16th century
1
1763-1848
1
1775-1817
1
1776-1822
1
1783-1865
1
1789-1799
1
1791-1883
1
1793-1873
1
1806-1872
1
1813-1887
1
1815-1861
1
more ...