Era
1939-1945
69
1939 - 1945
31
German occupation, 1941-1944
23
20th century
20
1900-1999
19
Revolution, 1917-1921
16
21st century
9
2000-2099
7
2014
7
Siege, 1942
6
1900 - 1999
5
1901-1989
5
1917-1921
4
1986
4
1878-1928
3
1906-1982
3
1915-1994
3
Siege, 1854-1855
3
Siege, 1941
3
1853 - 1856
2
1853-1856
2
1881-1962
2
1886-1929
2
1943
2
1991-
2
Since 1991
2
Soviet occupation, 1979-1989
2
1700-1799
1
1763-1817
1
1800-1899
1
1810-1881
1
1834 or 1835-1907
1
1854-1855
1
1863-1928
1
1873-1945
1
1887-1959
1
1892-1977
1
18th century
1
1900-1982
1
1904-1905
1
1906-1986
1
1907-
1
1907-1987
1
1911-1975
1
1912-1992
1
1915-2000
1
1917 - 1921
1
1917-
1
1917-1944
1
1921-1944
1
more ...