Era
20th century
27
To 1500
25
17th century
21
18th century
18
1900-1999
17
19th century
17
21st century
12
1800-1899
11
Colonial period, ca. 1600-1775
10
16th century
9
1500-1699
8
2000-2099
8
Early modern, 1500-1700
7
1600-1799
6
1775-1783
6
Revolution, 1775-1783
6
1500-1700
5
Middle English, 1100-1500
5
1700-1799
4
Early modern and Elizabethan, 1500-1600
4
1700-1899
3
1783-1850
3
1856-1924
3
1913-1921
3
Middle Ages, 600-1500
3
To 1810
3
1564-1616
2
1600-1699
2
1600-1775
2
1644-1718
2
1696 or 1697-1774
2
1706-1790
2
1735-1826
2
1770-1850
2
1819-1892
2
1871-1945
2
1884-1972
2
1895-1979
2
1900-2099
2
1913-1929
2
1921-1923
2
1923-1929
2
1929-1968
2
1958-
2
Old English, ca. 450-1100
2
To 1775
2
-1400
1
-629 or 630
1
-632
1
-673?
1
more ...