Era
1945-
55
20th century
22
19th century
10
1933-1945
9
1960-
7
1976-
5
1981-
5
1818-1883
4
18th century
4
1917-
4
1918-1945
4
1961-
4
1971-
4
1975-
4
1485-
3
1970-
3
Addresses, essays, lectures
3
1399-1485
2
1485-1509
2
1638-1715
2
1789-1900
2
1837-1901
2
1883-1950
2
1889-1945
2
1918-1933
2
1924-
2
1947-
2
1948-
2
1949-
2
1951-
2
1964-
2
1969-
2
1975-1985
2
1977-
2
1980
2
1980-
2
1588-1679
1
1643-1715
1
1723-1790
1
1724-1804
1
1741-1820
1
1760-1860
1
1783-1809
1
1800-1933
1
1849-1870
1
1852-1928
1
1856-1924
1
1856-1939
1
1859-1952
1
1863-1945
1
more ...