Ottavio Farnese reigned as Duke of Parma and Piacenza from 1547 until his death and Duke of Castro from 1545 to 1547 and from 1553 until his death.
- Occupation
- politician
- Position held
- Duke of Castro, Duke of Castro, duke, Gonfalonier of the Church
- Citizenship
- Papal States
- Born
- October 9, 1524
- Died
- September 18, 1586