Era
20th century
12
German occupation, 1940-1945
5
1933-1945
4
1945-
4
1918-1933
3
19th century
3
1871-1918
2
18th century
2
1914-1940
2
Unification, 1990
2
1668-1744
1
1789-1900
1
17th century
1
1815-1866
1
1815-1870
1
1866-1871
1
1867-1918
1
1870-1940
1
1889-1945
1
1890-1945
1
1913-1994
1
1917-1945
1
1940-1945
1
1945-1976
1
1958-
1
1973-
1
1985-1995
1
1989-
1
1989-1990
1
Civil War, 1994
1