Era
20th century
33
19th century
22
1945-
8
18th century
6
1856-1939
4
1904-
4
1980-
4
21st century
4
1854-1900
3
1947-
3
1960-
3
1903-1989
2
1960-1980
2
Allied occupation, 1945-1952
2
1644-1912
1
1688-1744
1
16th century
1
1780-1831
1
17th century
1
1809-1882
1
1834-1900
1
1837-1901
1
1840-1893
1
1858-1917
1
1869-1948
1
1870-1937
1
1870-1940
1
1882-1941
1
1902-1987
1
1906-1988
1
1910-
1
1910-1936
1
1915-
1
1917-
1
1917-,
1
1918-1945
1
1926-1984
1
1929-2007
1
1932-
1
1933-1945
1
1934-
1
1941-
1
1942-
1
1945-1989
1
1945-1991
1
1953-1975
1
1953-1985
1
1956-
1
1961-
1
1962-
1
more ...