Era
20th century
327
19th century
134
18th century
50
17th century
22
Early modern, 1500-1700
15
Victoria, 1837-1901
15
1933-1945
14
16th century
13
1917-1936
12
1918-1933
11
1945-
10
21st century
9
1925-1953
7
Revolution, 1775-1783
7
Civil War, 1861-1865
6
Civil War, 1936-1939
6
1769-1821
5
1878-1953
5
1889-1945
5
1916-
5
1936-1953
5
1960-1980
5
1990-
5
Revolution, 1789-1799
5
Revolution, 1917-1921
5
1564-1616
4
1837-1901
4
1898-1976
4
1905-1957
4
1910-1921
4
1929-1968
4
1949-1976
4
1979-1997
4
1985-1991
4
British occupation, 1765-1947
4
German occupation, 1940-1945
4
Republic, 1912-1949
4
1564-1642
3
1736-1819
3
1789-1815
3
1807-1882,
3
1819-1891
3
1819-1901
3
1849-1870
3
1854-1900
3
1859-1941
3
1870-1924
3
1879-1955
3
1880-1952
3
1880-1969
3
more ...