Era
20th century
135
1900-1999
67
21st century
23
19th century
22
2000-2099
11
18th century
9
1933-1945
8
1800-1899
6
1989-
6
1936-1953
5
1945-
5
Since 1900
5
1883-1954
4
1900 - 1999
4
1917-1970
4
1930-1945
4
1991-
4
Unification, 1990
4
1900-2099
3
1912-1945
3
1940-1945
3
1944-1989
3
1945-1990
3
1980-
3
1994-
3
German occupation, 1940-1945
3
Since 1989
3
Since 1991
3
1700-1799
2
1700-1999
2
1830-1915
2
1867-1910
2
1878-1953
2
1883-1945
2
1889-1945
2
1896-1948
2
1901-1945
2
1914-1940
2
1917-1936
2
1925-1953
2
1935-1958
2
1945-1989
2
1945-1991
2
1949-1976
2
1966-1998
2
1970-
2
1990-
2
2000-
2
Empire, 30 B.C.-284 A.D.
2
Empire, 30 B.C.-476 A.D.
2
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