Era
20th century
8
19th century
7
18th century
4
1945-
4
Unification, 1990
3
1775-1783
2
1933-1945
2
1485-
1
1504-1575
1
1557-1638
1
16th century
1
1783-1809
1
1783-1815
1
1789-1809
1
17th century
1
1809-1817
1
1866-1871
1
1918-1945
1
1947-
1
1980-
1
1985-1991
1
1989-
1
1991-
1
1997-
1
2001-2009
1
Revolution, 1775-1783
1