House of Bourbon-Parma

The House of Bourbon-Parma (Italian: Casa di Borbone di Parma) is a cadet branch of the Spanish royal family, whose members once ruled as King of Etruria and as Duke of Parma and Piacenza, Guastalla, and Lucca. The House descended from the French Capetian dynasty in male line. Its name of Bourbon-Parma comes from the main name (Bourbon) and the other (Parma) from the title of Duke of Parma. The title was held by the Spanish Bourbons, as the founder Philip, Duke of Parma was the great-grandson of Ranuccio II Farnese, Duke of Parma. The House of Bourbon-Parma is today the Sovereign House of the Grand Duchy of Luxembourg (agnatically) and all members of the Grand Ducal Family of Luxembourg are members of the House of Bourbon-Parma with the title of "Princes/Princesses" and the predicate of Royal Highness.
The Duchy of Parma was created in 1545 from that part of the Duchy of Milan south of the Po River, as a fief for Pope Paul III's illegitimate son, Pier Luigi Farnese, centered on the city of Parma. In 1556, the second Duke, Ottavio Farnese, was given the city of Piacenza, becoming thus also Duke of Piacenza, and so the state was thereafter properly known as the Duchies of Parma and Piacenza.
The House of Farnese continued to rule the duchies until 1731 and the death of the last male-line duke, Antonio. Upon his death the duchy passed to Charles of Bourbon, the heir to the duchy through his mother, Elisabeth Farnese. However by the terms of the Treaty of Vienna (1738) Charles had to give up the duchy to Austria.
The Habsburgs only ruled until the conclusion of the Treaty of Aix-la-Chapelle in 1748, when it was ceded back to the Bourbons in the person of Philip of Spain, Charles's younger brother. As Duke Philip, he became the founder of the House of Bourbon-Parma.
In 1796, the duchy was occupied by French troops under Napoleon Bonaparte and absorbed into the Cisalpine Republic and Kingdom of Italy.
In 1814, the duchies were restored under Napoleon's Habsburg wife, Marie Louise, who was to rule them for her lifetime. The duchy was renamed the Duchy of Parma, Piacenza and Guastalla.
After Marie Louise's death in 1847, the duchy was restored to the Bourbon-Parma line, which had been ruling the tiny Duchy of Lucca. As part of the return, the Duchy of Guastalla was transferred to the Duchy of Modena. The Bourbons ruled until 1859, when they were driven out by a revolution following the Franco-Sardinian victory in their war against Austria.
The duchies of Parma, Piacenza and Guastalla and the Duchy of Lucca joined with the Grand Duchy of Tuscany and the Duchy of Modena to form the United Provinces of Central Italy in December 1859, and were annexed to the Kingdom of Sardinia in March 1860. The House of Bourbon continues to claim the title of Duke of Parma to this day. Carlos-Hugo (Carlist pretender to the Spanish throne in the 1970s) held the title from 1977 to his death. His son now claims the title.
During the French ownership of the Duchy of Parma, the title of Duke of Parma was used as an honorary form and style. From 1808, the title was used by Jean Jacques Régis de Cambacérès. He kept the style of Duke of Parma until 1814. Only in 1847 was the actual title restored to the Bourbons, after a period of being held by Marie Louise of Austria, who was a Habsburg and the second wife of Napoleon I.