Era
1933-1945
134
1889-1945
113
20th century
82
1945-1990
46
1918-1933
29
Unification, 1990
26
1939-1945
20
1906-1962
19
1900-1999
17
1789-1900
10
1989-1990
10
19th century
10
1897-1945
9
1913-1991
9
1918-1945
9
1945-1955
9
1871-1918
8
1900-1945
8
1939-
7
1961-1989
7
1905-1981
6
1990-
6
1845-1886
5
1933 - 1945
5
1960-
5
Blockade, 1948-1949
5
1866-1871
4
1886-1954
4
1888-1948
4
1888-1966
4
1888-1972
4
1911-1979
4
1921-1943
4
1945-
4
1967-
4
1990
4
To 476
4
1859-1941
3
1888-1918
3
1893-1946
3
1893-1967
3
18th century
3
1907-1944
3
1939 - 1945
3
1961-1990
3
21st century
3
Since 1900
3
To 843
3
1517-1648
2
16th century
2
more ...