Era
20th century
39
19th century
9
18th century
8
1947-
5
21st century
5
17th century
4
1864-1922
4
356 B.C.-323 B.C.
4
Civil War, 1861-1865
4
1412-1431
3
1740-1795
3
1809-1865
3
1848-1929
3
1874-1965
3
1900-1959
3
1905-1976
3
1917-1963
3
1924-1960
3
1926-1960
3
1929-1994
3
1936-1960
3
1945-
3
1958-
3
Elizabeth II, 1952-2022
3
1475-1564
2
1491-1547
2
1507-1536
2
1632-1675
2
16th century
2
1757-1804
2
1799-1847
2
1806-1861
2
1822-1913
2
1843-1916
2
1851-1887
2
1868-1944
2
1878-1967
2
1879-1915
2
1879-1955
2
1886-1957
2
1886-1967
2
1886-1973
2
1887-1986
2
1895-1952
2
1896-1966
2
1900-2002
2
1901-1966
2
1904-1990
2
1906-1975
2
1908-1957
2
more ...