Era
1945-
18
20th century
13
1918-1945
10
1990-
9
21st century
8
Since 1945
5
1900-1999
4
2000-2099
4
Since 1990
4
1750-1918
3
1918-
3
Since 1900
2
1600-1837
1
1714-1837
1
17th century
1
1809-1865
1
1849-1877
1
1861-1865
1
1865-1918
1
1876-1929
1
18th century
1
1900-2099
1
1939 - 1945
1
1945-1955
1
1945-1989
1
1955-1965
1
1960-
1
1971-1990
1
1973-
1
19th century
1
Civil War, 1861-1865
1
Medieval, 500-1500
1
Stuarts, 1603-1714
1
To 1800
1
To 1865
1
To 1877
1
To 1933
1
To 500
1