Era
20th century
49
1945-
19
1961-
16
21st century
15
Quaternary
6
19th century
5
18th century
4
1951-
3
1971-
3
2001-
3
Holocene
3
1714-1837
2
1789-1900
2
1941-
2
1945-1989
2
1946-
2
1948-
2
1950-
2
1955-
2
1960-
2
1970-
2
1989-
2
1991-
2
476-1492
2
Revolution, 1789-1799
2
Stuarts, 1603-1714
2
Tudors, 1485-1603
2
1573-1610
1
1644-1911
1
1689-1714
1
1769-1821
1
1770-1831
1
1775-1817
1
17th century
1
1809-1882
1
1811-1889
1
1812-1870,
1
1819-1884
1
1831-1915
1
1840-1928
1
1843-1916
1
1845-1861
1
1850-1950
1
1856-1939
1
1858-1917
1
1861-1865
1
1861-1947
1
1864-1920
1
1870-1945
1
1871-1918
1
more ...