Era
20th century
2,145
19th century
1,135
1900-1999
1,075
1800-1899
500
18th century
429
17th century
311
1900 - 1999
260
1939-1945
252
16th century
182
20e siècle
182
1800 - 1899
172
1933-1945
155
1700-1799
151
Revolution, 1917-1921
134
To 1500
120
Civil War, 1861-1865
104
1600-1699
98
1918-1945
92
Early modern, 1500-1700
87
19e siècle
85
Revolution, 1789-1799
77
1801-1917
76
Qing dynasty, 1644-1912
76
1564-1616
73
Early works to 1800
72
Middle Ages, 600-1500
68
1800-1999
67
1789-1815
65
Nicholas II, 1894-1917
64
1917-1936
63
Revolution, 1775-1783
63
Ming dynasty, 1368-1644
62
1500-1599
57
1700 - 1799
57
1644-1912
55
1941-1979
54
1914-1918
52
Colonial period, ca. 1600-1775
52
1917-1921
51
1918-1933
50
Louis XIV, 1643-1715
50
1700-1899
49
1894-1917
47
1925-1953
47
1945-
46
Pahlavi dynasty, 1925-1979
45
1769-1821
44
1939 - 1945
44
1945-1980
44
Primitive and early church, ca. 30-600
43
more ...