Era
20th century
17
1945-
5
19th century
5
1900-1999
4
1918-
4
21st century
4
1918-1933
3
1933-1945
3
Since 1945
3
1790-1866
2
1900 - 1999
2
1918-1945
2
1941-1979
2
1945-1989
2
1991-
2
1997-
2
Revolution, 1905-1907
2
Since 1991
2
Since 1997
2
1775-1865
1
1779-1848
1
1809-1865
1
1821-1999
1
1860 - 1910
1
1860-1910
1
1861-1917
1
1871-1888
1
1898-1951
1
1900-1945
1
1909-1994
1
1914-
1
1917-1936
1
1919-1932
1
1926
1
1929
1
1929-1933
1
1945 - 1989
1
1945-1992
1
1960 - 1980
1
1960-
1
1960-1980
1
1961 - 1975
1
1961 - 1979
1
1961-1975
1
1961-1979
1
1963-
1
1963-1969
1
1964-1979
1
1965-
1
1969-1974
1
more ...