Era
20th century
1900-1999
85
Since 1900
16
19th century
14
1945-1989
10
1945-
9
1970-
6
1989-
6
21st century
6
1800-1999
5
1933-1945
5
1980-
5
1883-1954
4
1900 - 1999
4
1930-1945
4
1931-1940
3
1945-1992
3
1946-1970
3
1960-1980
3
1968-1989
3
1970-1988
3
1798-1942
2
1798-1999
2
1877-1942
2
1878-1953
2
18th century
2
1900-2099
2
1901-1926
2
1914-1940
2
1917-1970
2
1918-1940
2
1936-1953
2
1939-2017
2
1943-1955
2
1945-1970
2
1946-
2
1971-1981
2
1981-2001
2
1999-
2
20h century
2
Civil War, 1861-1865
2
Civil War, 1936-1939
2
German occupation, 1940-1945
2
Revolution, 1958
2
Unification, 1990
2
1700-1999
1
1849-1923
1
1859-1952
1
1861-1999
1
1865-1918
1
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