Era
20th century
16
1918-1933
10
1933-1945
4
1945-1990
4
1871-1918
3
1945-
3
19th century
3
Unification, 1990
3
1989-
2
16TH CENTURY
1
1785-1863
1
1786-1859
1
1789-1900
1
1856-1915
1
1866-1944
1
1871-
1
1884-1977
1
1888-1985
1
1893-1959
1
1900-
1
1919-1932
1
1945-1955
1
1989
1
1989-1990
1
1990-
1
19TH CENTURY
1
20TH CENTURY
1