Era
20th century
317
1900-1999
223
17th century
64
16th century
52
1900 - 1999
51
19th century
51
18th century
42
20e siècle
33
Middle Ages, 600-1500
31
1600-1699
27
600-1500
27
1945-1980
24
1500-1599
23
1945-
20
1800-1999
18
1980-1989
18
21st century
18
1800-1899
17
Since 1900
17
1700-1799
16
1500-1699
14
1901-1981
14
Piast period, 960-1386
10
To 1500
10
1918-1945
9
To 1572
9
1600-1799
8
1989-
8
2000-2099
8
500-1500
8
1500 - 1599
7
15th century
7
1945-1989
7
Geschichte
7
To 1795
7
1864-1918
6
1945-1970
6
21e siècle
6
1600 - 1699
5
1700-1899
5
17e siècle
5
1857-1939
5
1894-1941
5
1920-2005
5
1980-
5
600 - 1500
5
Boleslaus I, 992-1025
5
Occupation, 1939-1945
5
16e siècle
4
1796-1918
4
more ...