Era
20th century
5,914
18th century
4,398
19th century
4,322
Revolution, 1789-1799
3,384
1900-1999
2,180
17th century
2,134
Colonial period, ca. 1600-1775
1,495
1800-1899
1,300
16th century
1,226
Civil War, 1642-1649
1,164
Revolution, 1775-1783
1,071
1900 - 1999
1,028
Cultural Revolution, 1966-1976
943
1700-1799
929
1939-1945
914
Qing dynasty, 1644-1912
884
1945-
834
1933-1945
830
To 1500
777
Revolution, 1917-1921
713
Charles I, 1625-1649
702
1789-1799
653
Ming dynasty, 1368-1644
652
Early works to 1800
620
1775-1865
618
1600-1699
612
1644-1912
590
1642-1649
587
1800 - 1899
578
Middle Ages, 600-1500
566
Civil War, 1861-1865
561
1625-1649
558
1700 - 1799
522
1600-1775
521
1789 - 1799
507
1642 - 1649
506
1918-1945
506
1775-1783
501
1789-1815
496
1500-1599
423
Since 1945
409
1939 - 1945
379
1600 - 1699
368
1917-1921
347
1625 - 1649
344
1600 - 1775
325
To 1810
321
1945-1989
300
1368-1644
294
843-1273
293
more ...