Era
20th century
36
1900-1999
27
1945-
21
18th century
19
19th century
16
Revolution, 1775-1783
11
1939-1945
9
1979-
7
1800-1837
5
1900-1945
5
1945-1980
5
1945-1991
5
20e siècle
5
Colonial period, ca. 1600-1775
5
Early 19th century
5
Since 1979
5
1760-1789
4
1809-1865
4
1918-1945
4
1975-
4
Civil War, 1861-1865
4
Since 1945
4
1783-1850
3
1933-1945
3
1973-
3
1980-
3
1809-1817
2
1819-1892
2
1837-1901
2
1860-1918
2
1881-1945
2
1892-1984
2
1898-1946
2
1914-
2
1917-1945
2
1931-1939
2
1934-
2
1939-1975
2
1944-1989 (Polska Ludowa)
2
1945-1989
2
1945-1992
2
1948-
2
1953-1985
2
1979-1992
2
German occupation, 1940-1945
2
Occupation, 1939-1945
2
Since 1931
2
Since 1934
2
Since 1975
2
1473-1543
1
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