Philippe François, 1st Duke of Arenberg
Philippe François de Ligne, (30 July 1625 - 17 December 1674), 7th Duke of Aarschot, 1st Duke of Arenberg, a Knight of the Order of the Golden Fleece, was the first son of the second marriage of Philippe Charles, Comte d'Arenberg and Isabelle Claire de Berlaymont.
On 14 July 1642 Philippe François married 15-year-old Magdalena de Borja y Doria, the elder sister of Ana Francisca de Borja y Doria.
In 1646, aged 21, Philipe was made a Knight of the Order of the Golden Fleece.
Their children:
1 François of Arenberg (5 September 1643 - 10 September 1643).
2 Isabelle Claire Eugénie of Arenberg (12 July 1644 - 5 October 1655).
When he died in December 1674, the title passed to his half-brother, Charles Eugene, Duke of Arenberg, (1633–1681), who was promoted to become a Knight of the Order of the Golden Fleece in 1678.
Charles Eugene, 2nd Duke of Arenberg
Charles Eugene, 2nd Duke of Arenberg( 1633 – 1681), a Knight of the Order of the Golden Fleece since 1678, became 2nd Duke of Arenberg in 1674 on the death of his half- brother Philippe François, 1st Duke of Arenberg.
The original title had been awarded on 6 June 1644, by Habsburg Emperor Ferdinand III, Holy Roman Emperor, making the principality of Arenberg a dukedom of the Austrian Empire ..
He married Marie- Henriette de Cusance, marquise de Varambon in 1660.
Their two sons Philippe Charles François, 3rd Duke of Arenberg and Alexandre, fell in battle in 1691 and 1683 respectively.
He was Grand- Bailli and Capitaine- Général of Hainaut.
Auguste Marie Raymond d'Arenberg
Prince Auguste Marie Raymond d'Arenberg, Count of La Marck Grandee of Spain (30 August 1753 – 26 September 1833), was the second son and fourth child of Charles, 5th Duke of Arenberg, the head of the House of Arenberg (and who still held the rank of sovereign princes).
Princess Amélie Louise of Arenberg
Princess Amélie Louise d'Arenberg, full German name: "
Amalie Luise, Prinzessin und Herzogin von Arenberg" and full French name: "Amélie Louise, princesse et duchesse d'Arenberg", (born 10 April 1789 in Brussels, Austrian Netherlands; died 4 April 1823 in Bamberg, Kingdom of Bavaria) was a member of the House of Arenberg by birth and, through her marriage to Duke Pius August in Bavaria, a member of the Palatinate-Birkenfeld-Gelnhausen line of the House of Wittelsbach.
Amélie Louise was a grandmother of Empress Elisabeth of Austria through her son Duke Maximilian Joseph in Bavaria.
Princess Louise of Prussia (1808–1870)
Princess Louise of Prussia (1 February 1808 – 6 December 1870) was the third surviving daughter and ninth child of Frederick William III of Prussia and Louise of Mecklenburg-Strelitz.
Charles de Ligne, 2nd Prince of Arenberg
Princely Count Charles of Arenberg, duke of Aarschot (jure uxoris), baron of Zevenbergen, knight of the Order of the Golden Fleece, (Vollenhove, 22 February 1550 – Enghien, 18 January 1616) was the second Princely Count of Arenberg and a leading aristocrat of the Habsburg Netherlands, who served as a courtier, soldier, minister and diplomat.
Léopold Philippe d'Arenberg
Leopold Philippe of Arenberg (October 14, 1690 – March 4, 1754) was the 4th Duke of Arenberg, 10th Duke of Aarschot and an Austrian Field Marshal.
Louis Engelbert, 6th Duke of Arenberg
Louis Engelbert of Arenberg( August 3, 1750 in Brussels – March 7, 1820 in Brussels), nicknamed" the blind duke", was between 1778 and 1801 the sixth Duke of Arenberg and 12th Duke of Aarschot.
Between 1803 and 1810 he ruled a Duchy in North- western Germany also called Duchy of Arenberg.
He was born in Brussels as son of Charles Marie Raymond of Arenberg, one of the most prominent nobles in the Austrian Netherlands, and Louise Margaret von der Mark und Schleide.
At the age of 24, during a hunting party, he was hit in the face by a shotgun and remained blind for the rest of his life.
Unable to pursue the usual military career, he turned to science, art and music .< br>
Under his patronage, the first manned gas- filled balloon flight in history took off from the front lawn of the Arenberg Castle on November 21, 1783; the balloonist was professor Jan Pieter Minckeleers.
At the beginning of the French Revolution, he succeeded in keeping his possessions, but when Bonaparte annexed the Rhineland, he lost most of his territories.
In the Reichsdeputationshauptschluss of 1803 though, he was compensated with Recklinghausen and Meppen, together also named the Duchy of Arenberg.
In 1810 he abdicated in favor of his son Prosper Louis.
Louis Engelbert was named senator by Napoleon and a count of the First French Empire.
After 1815, he returned to Belgium, where the Duchy of Arenberg was restored to the family by the Congress of Vienna, be it without the sovereignty of before.
Engelbert, 8th Duke of Arenberg
Engelbert August Anton of Arenberg
(Brussels, 11 May 1824 – Arenberg Castle, 28 March 1875) was 8th Duke of Arenberg and 14th Duke of Aarschot.
He was the son of Prosper Louis, 7th Duke of Arenberg, and belonged to one of the most important European noble families.
He was Duke of Arenberg, Duke of Aarschot, Duke of Meppen and Prince of Recklinghausen.
In 1868, he married his second cousin Eleonore Ursula d'Arenberg (1845 - 1919).
They had three daughters and two sons:
The Arenberg Foundation describe him as a great patron of the arts.
He was the last Duke of Arenberg to hold possessions in Germany.
These were lost in the German Unification.
In 1861 he became a member of the Prussian House of Lords.
Duke Pius August in Bavaria
Duke "Pius August" in Bavaria, full German name:
"Pius August Herzog in Bayern" (born 1 August 1786 in Landshut, Electorate of Bavaria; died 3 August 1837 in Bayreuth, Kingdom of Bavaria) was a Duke in Bavaria as a member of the Palatine Birkenfeld-Gelnhausen line of the House of Wittelsbach.
Pius August was a grandfather of Empress Elisabeth of Austria through his son Duke Maximilian Joseph in Bavaria, as well as a great grandfather of Queen Elisabeth of the Belgians and an ancestor of the current generations of the Belgian and Italian Royal Families and the Grand Ducal Family of Luxembourg .

Question: Where did Princess Amélie Louise Of Arenberg's husband die?
Answer: Bayreuth