Duke of Parma
…Royal Highness First monarch Pier Luigi Farnese Last monarch Robert I Formation 16 September 1545 Abolition December 3, 1859 (1859-12-03) Pretender Carlos, Duke of Parma The Duke of Parma and Piacenza (Italian: duca di Parma e Piacenza) was the ruler of the Duchy of Parma and Piacenza, a historical state of Northern…