Era
1933-1945
1878-1944
5
1878-1945
4
1918-1933
4
1874-1965
3
1918-1945
3
1945-1953
3
20th century
3
1882-1949
2
1894-1943
2
1918-1944
2
1933-1953
2
1945-1955
2
Boris III, 1918-1943
2
1853-1939
1
1869-1939
1
1878-1844
1
1900 - 1999
1
1900-1999
1
1926-2016
1
1933 - 1953
1
1941-1944
1
1944-1990
1
1989-
1
19th century
1
Occupation, 1939-1945
1
Since 1918
1