Era
20th century
5
Revolution, 1917-1921
5
1878-1953
3
1936-1953
3
1985-1991
3
1917-1936
2
1925-1953
2
19th century
2
1689-1800
1
1801-1917
1
1882-1940
1
1894-1917
1
18th century
1
1917-1921
1
1917-1991
1
1945-
1
1973-
1
1989-
1
1991-
1
20thcentury
1
Catherine II, 1762-1796
1
Occupation, 1939-1945
1
Soviet occupation, 1939-1941
1
Soviet occupation, 1979-1989
1
Unification, 1990
1