Era
20th century
170
19th century
46
21st century
21
1933-1945
17
1945-
13
18th century
11
1989-
11
17th century
7
1990-
7
1945-1990
5
1801-1917
4
1960-
4
1980-
4
1994-
4
16th century
3
1789-1900
3
1789-1945
3
1945-1992
3
1991-
3
Civil War, 1994
3
German occupation, 1941-1944
3
1564-1616
2
1800-1933
2
1871-1918
2
1889-1945
2
1912-
2
1918-
2
1918-1938
2
1918-1945
2
1921-
2
1929-
2
1937-1945
2
1951-
2
1969-
2
1985-1991
2
1992-
2
20TH CENTURY
2
Early modern, 1500-1700
2
German occupation, 1940-1945
2
Unification, 1990
2
Victoria, 1837-1901
2
Warsaw Ghetto Uprising, 1943
2
(1939-1945)
1
1534-1921
1
1603-1714
1
1644-1912
1
1689-1801
1
1711-1799
1
1750-1815
1
1777-1918
1
more ...