Era
20th century
30
19th century
20
1900-1999
12
21st century
11
1939-1945
9
1800-1999
5
1973-2020
5
2000-2099
5
18th century
4
Revolution, 1775-1783
4
1775-1783
3
1800-1899
3
1809-1865
3
1900-2099
3
Civil War, 1861-1865
3
German occupation, 1940-1945
3
1564-1616
2
1700-1899
2
1801-1917
2
1862-1937
2
1868-1926
2
1870-1924
2
1887-1948
2
1887-1972
2
1895-1967
2
1900 - 1999
2
1929-1968
2
2003-2011
2
1288-1918
1
1452-1519
1
1600-1799
1
1742-1807
1
1749-1832
1
1775-1859
1
17th century
1
1800 - 1899
1
1800-1912
1
1800-1917
1
1801-1863
1
1804-1864
1
1807-1889
1
1807-1894
1
1811-1896
1
1817-1862
1
1819-1891
1
1819-1892
1
1823-1878
1
1826-1864
1
1856-1929
1
1856-1939
1
more ...