Era
20th century
57
1940-1991
42
1991-
31
1918-1940
26
Soviet occupation, 1940-1941
21
War of Independence, 1918-1920
11
German occupation, 1941-1944
9
19th century
8
Revolution, 1905-1907
5
1922-
4
21st century
4
16th century
3
1874-1956
3
18th century
3
1953-
3
17th century
2
1861-1917
2
1868-
2
1889-1976
2
1896-1968
2
1900-1937
2
1939-1940
2
1956-
2
Revolution, 1917-1918
2
1220-1263
1
1523-1718
1
1672-1725
1
1684-1727
1
1688-1713
1
1689-1801
1
1801-1917
1
1839-1907
1
1854-1910
1
1854-1923
1
1861-1942
1
1867-1943
1
1882-1963
1
1883-1940
1
1884-1904
1
1884-1957
1
1886-1963
1
1891-
1
1895-
1
1895-1942
1
1895-1944
1
1895-1985
1
1897-1965
1
1905-1980
1
1905-1986
1
1907-
1
more ...