Pier Luigi Farnese

Pier Luigi Farnese
Portrait by Titian
Duke of Parma and Piacenza
Reign	16 September 1545 – 10 September 1547
Successor	Ottavio
Born	19 November 1503 Rome, Papal States
Died	10 September 1547(1547-09-10) (aged 43) Piacenza, Duchy of Parma and Piacenza
Spouse	Gerolama Orsini
Issue	Cardinal Alessandro Ottavio, Duke of Parma Cardinal Ranuccio Vittoria, Duchess of Urbino Orazio, Duke of Castro
House	Farnese
Father	Pope Paul III
Mother	Silvia Ruffini

Pier Luigi Farnese (19 November 1503 – 10 September 1547) was the first Duke of Castro from 1537 to 1545 and the first Duke of Parma and Piacenza from 1545 to 1547. He was the illegitimate son of Cardinal Alessandro Farnese (who later became Pope Paul III). He became a soldier and participated in the sack of Rome in 1527.