Era
20th century
34
1945-1964
19
19th century
16
1965-
14
1856-1915
4
1758-1843
3
1929-1968
3
21st century
3
1945-
2
2009-
2
To 1964
2
1743-1826
1
1783-1865
1
1803-1890
1
1811-1900
1
1815-1864
1
1833-1909
1
1851-1931
1
1855-1902
1
1857-1949
1
1859-1952
1
1861-1925
1
1863-1915
1
1865-1918
1
1870-1945
1
1870-1952
1
1877-1965
1
1880-1959
1
1883-1944
1
1892-1980
1
1893-1978
1
18th century
1
1913-2005
1
1915-
1
1919-1992
1
1941-1955
1
1944-
1
1950-
1
1969-
1
2017-2021
1
Educational Challange
1
World War, 1939-1945
1