Era
20th century
41
Early works to 1800
31
1564-1616
16
1939-1945
12
1979-1997
12
19th century
11
1817-1862
10
1900-1999
10
1981-1989
10
To 221 B.C
10
17th century
9
1945-1989
9
18th century
8
1945-
8
1993-2001
8
1775-1783
6
1783-1809
6
1993-
6
21st century
6
Civil War, 1861-1865
6
1835-1910
5
1939 - 1945
5
1979-
5
1981 - 1989
5
1989-
5
Since 1945
5
Since 1993
5
approximately 600-661
5
1040-1105
4
1732-1799
4
1854-1900
4
1929-1968
4
1960-
4
1989-1993
4
Early church, ca. 30-600
4
Period of civil wars, 1480-1603
4
Revolution, 1789-1799
4
Since 1960
4
To 997
4
active 6th century
4
1480-1603
3
1600-1649
3
1600-1699
3
16th century
3
1700-1799
3
1706-1790
3
1735-1826
3
1743-1826
3
1751-1836
3
1769-1821
3
more ...