Era
20th century
18
1844-1900
8
1889-1945
5
1918-1933
5
1933-1945
5
19th century
5
1990-
3
1770-1831
2
1788-1860
2
1813-1883
2
1892-1940
2
18th century
2
1942-
2
Unification, 1990
2
-approximately 807
1
1295-1366
1
13th century
1
14th century
1
1517-1648
1
1646-1716
1
16th century
1
1767-1835
1
1769-1859
1
17th century
1
1800-1933
1
1815-1846
1
1818-1883
1
1837-1930
1
1850-1932
1
1850-1950
1
1854-1938
1
1858-1918
1
1864-1944
1
1867-1919
1
1869-1938
1
1871-1919
1
1879-1955
1
1882-1962
1
1883-1955
1
1885-1945
1
1885-1968
1
1886-1929
1
1888-1985
1
1892-1975
1
1895-1942
1
1895-1975
1
1898-1918
1
1900-2002
1
1904-1944
1
1906-1992
1
more ...