Era
20th century
6,375
Early works to 1800
3,764
19th century
3,650
17th century
3,299
1900-1999
2,900
21st century
2,349
18th century
1,696
To 1500
1,453
1800-1899
1,249
1945-
1,077
2000-2099
1,005
16th century
857
2001-2009
842
2009-
757
1939-1945
742
1946-
732
1991-
723
1900 - 1999
675
1989-
611
1948-
550
20e siècle
539
1960-
504
1700-1799
473
1600-1699
469
1933-1945
461
1947-
456
1981-2001
441
Since 1945
435
1971-1981
414
1951-
412
Geschichte
407
Civil War, 1861-1865
402
Colonial period, ca. 1600-1775
401
1980-
398
1993-
397
Since 1991
380
1990-
375
1949-
373
Since 2009
373
2001-
343
1724-1804
325
Revolution, 1789-1799
325
1942-
315
1800-1999
311
1971-
309
1800 - 1899
303
1644-1912
302
Since 1989
302
1881-1973
298
1944-
298
more ...