Duke of San Miguel
Duke of San Miguel () is a hereditary title in the peerage of Spain, accompanied by the dignity of Grandee and granted in 1625 by Philip IV to Juan Gravina, Vicar general of Spanish Sicily. 

The title became vacant for more than 200 years until Francisco Franco rehabilitated it in 1956 on behalf of Juan Castillejo y Ussía, 6th Count of Floridablanca and a descendant of the 2nd duke.

Federico Gravina, the Spanish admiral during the Battle of Trafalgar, was a son of the 1st Duke of San Miguel.
Q2554364
peerage of Spain
Concept
Q3907844
Grandee
Concept
Q691402
Philip IV
PER
Q1044528
Vicar general
Concept
Q188586
Spanish Sicily
LOC
Q29179
Francisco Franco
PER
Q2287910
Count of Floridablanca
PER
Q602054
Federico Gravina
PER
Q171416
Battle of Trafalgar
EVE
Q5814710
Duke of San Miguel
PER
Q5814710
Duke of San Miguel
PER
1625-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1625
DATE
1956-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1956
DATE
+6^^http://www.w3.org/2001/XMLSchema#decimal
6
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+1^^http://www.w3.org/2001/XMLSchema#decimal
1
NUMBER
participant