Era
Middle Ages, 500-1500
121
20th century
82
19th century
56
To 1500
51
To 500
40
Renaissance, 1450-1600
34
1900-1999
33
Modern period, 1600-
33
Medieval, 500-1500
25
Middle Ages, 600-1500
23
500-1500
22
16th century
14
18th century
13
17th century
12
1800-1899
11
Civil War, 1861-1865
7
-1400
6
600-1500
6
1450-1600
5
Since 1600
5
1800-1999
4
21st century
4
Early modern, 1500-1700
4
To 1863
4
1066-1485
3
1485-
3
1736-1784
3
1760-1821
3
1920-1951
3
1933-1945
3
1961-
3
approximately 1364-approximately 1431
3
1476-1514
2
1785-1830
2
1800 - 1899
2
1803-1879
2
1806-1873
2
1838-1865
2
1844-1900
2
1847-1939
2
1857-1943
2
1876-1959
2
1877-1965
2
1880-1965
2
1885-1979
2
1900 - 1999
2
1918-1932
2
1920-2013
2
476-1492
2
Medieval period, 987-1515
2
more ...