Era
20th century
151
19th century
87
1900-1999
59
To 1951
50
21st century
43
1889-1976
41
1931-1940
30
18th century
29
1800-1899
26
17th century
24
To 1500
21
To 1931
18
2000-2099
17
1812-1870
16
1564-1616
14
Time of Troubles, 1598-1613
14
1879-1955
13
1859-1941
12
1700-1799
10
1900-2099
10
1859-1938
8
1882-1941
8
1921-1930
8
1951-1960
8
Early modern, 1500-1700
8
Civil War, 1861-1865
7
Colonial period, ca. 1600-1775
7
16th century
6
354-430
6
1857-1924
5
1861-1947
5
1892-1940
5
1925-1995
5
1941-
5
Early modern and Elizabethan, 1500-1600
5
To 146 B.C.
5
1200-1253
4
1598-1613
4
1599-1662
4
1651-1716
4
1724-1804
4
1770-1850
4
1795-1821
4
1800-1999
4
1817-1862
4
1866-1946
4
1871-1922
4
1899-1961
4
1899-1977
4
1905-2000
4
more ...