Era
20th century
23
19th century
8
Middle English, 1100-1500
8
1808-1873
6
1926-
6
Ottoman Empire, 1288-1918
6
17th century
4
1957-2011
4
1985-
4
To 332 B.C
4
476-1492
3
600-1500
3
-1617
2
-918
2
1133-1189
2
1182-1226
2
1485?-1540
2
1564-1616
2
15th and 16th centuries
2
1816-1855
2
1863-1914
2
18th century
2
1904-1997
2
1915-1962
2
1918-1981
2
1918-2011
2
1947-
2
1950-
2
1967-
2
1979-
2
21st century
2
Anglo-Saxon period, 449-1066
2
Civil War, 1989-1996
2
Colonial period, ca. 1600-1775
2
Henry VIII, 1509-1547
2
Plantagenets, 1154-1399
2
Revolutionary period, 1775-1783
2
To 146 B.C
2
approximately 1480-1520
2
1027 or 1028-1087
1
1775-1817
1
1919-
1
1937-2020
1
1941-
1
1957-
1
1960-
1
1964-
1
1970-
1
1982-
1
1991-
1
more ...