Era
20th century
8
1908-1989
3
1911-1958
3
1918-2008
3
1939-1945
3
1906-2004
2
1917-1945
2
1957-2003
2
1964-
2
1966-2003
2
1969-
2
2001-2009
2
21st century
2
Nicholas II, 1894-1917
2
1781-1838
1
1865-1921
1
1867-1959
1
1870-1948
1
1876-1916
1
1884-1951
1
1894-1974
1
1894-1999
1
1900-1999
1
1941-2005
1
1946-
1
1961-2003
1
1964
1
1968-1992
1
1989
1
20e siècle
1
Boxer Rebellion, 1899-1901
1
Forced removal and internment, 1942-1945
1