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Frederick William, Duke of Brunswick-Wolfenbüttel

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Title: Frederick William, Duke of Brunswick-Wolfenbüttel  
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Subject: Charles II, Duke of Brunswick, Charles William Ferdinand, Duke of Brunswick-Wolfenbüttel, Princess Augusta of Great Britain, Battle of Gefrees, Battle of Quatre Bras
Collection: 1771 Births, 1815 Deaths, Dukes of Brunswick-Lüneburg, Freikorps Personnel of the Napoleonic Wars, German Lutherans, German Military Personnel Killed in Action, German Military Personnel of the French Revolutionary Wars, House of Brunswick-Bevern, Military Personnel Killed in the Napoleonic Wars, People from Braunschweig, People from the Duchy of Brunswick, Princes of Wolfenbüttel, Protestant Monarchs, Prussian Commanders of the Napoleonic Wars, Prussian Generals
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Frederick William, Duke of Brunswick-Wolfenbüttel

Frederick William
Duke of Brunswick-Lüneburg, Prince of Brunswick-Wolfenbüttel
Painting by Johann Christian August Schwartz (1809)
Reign 16 October 1806 – 16 June 1815
Predecessor Charles William Ferdinand
Successor Charles II
Born (1771-10-09)9 October 1771
Brunswick, Brunswick-Wolfenbüttel
Died 16 June 1815(1815-06-16) (aged 43)
Quatre Bras, United Kingdom of the Netherlands
Consort Princess Marie of Baden
Issue Charles II
Full name
Frederick William
German: Friedrich Wilhelm
House House of Brunswick-Bevern
Father Charles William Ferdinand, Duke of Brunswick
Mother Princess Augusta of Great Britain

Frederick William, Duke of Brunswick-Wolfenbüttel (German: Friedrich Wilhelm; 9 October 1771 – 16 June 1815) was a German prince and Duke of Brunswick-Lüneburg and Oels. Nicknamed "The Black Duke", he was a military officer who led the Black Brunswickers against French domination in Germany. He briefly ruled the state of Brunswick-Wolfenbüttel from 1806 to 1807 and again from 1813 to 1815.


  • Life 1
  • Family 2
  • Titles, styles, honours and arms 3
    • Titles and styles 3.1
    • Monuments 3.2
  • Ancestors 4
  • References 5
  • Further reading 6
  • External links 7


Prince Frederick William of Brunswick-Wolfenbüttel was born in George IV, Prince Regent of the United Kingdom (from 1811).

He joined the Prussian army in 1789 as a captain and participated in battles against Revolutionary France. In 1805, after his uncle, Frederick Augustus, Duke of Oels, had died childless, Frederick William inherited the Duchy of Oels, a small mediatized principality in Silesia subordinate to the King of Prussia.

Statue of Frederick William at Braunschweig, by Ernst Julius Hähnel

In October 1806, Frederick William participated in the Battle of Jena-Auerstädt as a major general of the Prussian army, of which his father was the field marshal. His father died from a wound he received in this battle, and Frederick William inherited Brunswick-Wolfenbüttel, since his eldest brother had died childless two months earlier, and both the second and third brother were mentally retarded. After the defeat of Prussia in the Fourth Coalition, his state remained under the control of France, however, and was formally made a part of the short-lived Napoleonic Kingdom of Westphalia in 1807. Frederick William fled to his parents-in-law in Bruchsal in the Grand Duchy of Baden, which had remained a sovereign state with the dissolution of the Holy Roman Empire in 1806 by Francis II, where he lived for the next few years.

When the War of the Fifth Coalition broke out in 1809, Frederick William used this opportunity to create a corps of partisans with the support of the Austrian Empire. This corps was called the Black Brunswickers because they wore black uniforms in mourning for their occupied country. He financed the corps independently by mortgaging his principality in Oels, and made his way from Austrian Bohemia through the French-allied states of Saxony and Westphalia to the North Sea coast.

Frederick William briefly managed to retake control of the city of Braunschweig in August 1809, which gained him the status of a local folk hero. He then fled to lieutenant general in the British Army on 1 July 1809.[1] His corps of originally 2,300 soldiers was largely destroyed in battles in Spain and Portugal during the Peninsular War.

Frederick William returned to Braunschweig in December 1813, after Prussia had ended French domination in Braunschweig-Lüneburg. When Napoleon returned to the political scene in 1815 during the Hundred Days, Frederick William raised fresh troops. He was killed by a gunshot at the Battle of Quatre Bras on 16 June. The night before he had attended the Duchess of Richmond's ball in Brussels and left it happy to have a chance to show his fighting ability.[2]


Brunswick Monument in Baisy-Thy. The German caption reads : Frederick-William Duke of Brunswick and Luneburg fought ahead of his troops and fell not far from this place on June 16th 1815.[3]

On 1 November 1802, in Karlsruhe, Frederick William married Princess Marie Elisabeth of Baden (7 September 1782 Karlsruhe – 20 April 1808 Bruchsal), daughter of Charles Louis, Hereditary Prince of Baden. The couple had three children before Marie died of puerperal fever four days after giving birth to a stillborn daughter.

Titles, styles, honours and arms

Titles and styles

  • 9 October 1771 – 20 September 1806: His Serene Highness Prince Frederick William, Duke of Brunswick-Wolfenbüttel
  • 20 September 1806 – 16 October 1806: His Serene Highness The Hereditary Duke of Brunswick
  • 16 October 1806 – 16 June 1815: His Serene Highness The Duke of Brunswick


  • Brunswick Monument at Quatre Bras, (Genappe, Belgium) erected by the Brunswick State for the 75th anniversary. The bronze lion was cast in the Wilhelm foundry in Bornum
  • An 1874 pair of equestrian statues of the Black Duke and his father are outside the Schloss-Arkaden (Brunswick Palace), Braunschweig. They were restored in 1973.[4]



  1. ^ John Philippart, The Royal Military Calendar (London, 1815) volume I, page 154
  2. ^ See testimonial given by Georgiana Dowager Lady De Ros.
  3. ^ "Friedrich Wilhelm Herzog zu Braunschweig und Lüneburg kämpfte und fiel unweit dieser Stätte an der Spitze seiner Truppen XVI Juni MDCCCXV.
  4. ^ The history of the castle of Braunschweig (Google Translate)

Further reading

  • Allgemeine Deutsche Biographie, vol. 7, p. 508-514
  • Hugo von Franckenberg-Ludwigsdorff: Erinnerungen an das Schwarze Corps, welches Herzog Friedrich Wilhelm von Braunschweig-Oels im Jahre 1809 errichtete. Aus dem Tagebuche eines Veteranen. Schwetschke, Braunschweig 1859, digitized.
  • Ruthard von Frankenberg: Im Schwarzen Korps bis Waterloo. Memoiren des Majors Erdmann von Frankenberg. edition von frankenberg, Hamburg 2015, ISBN 978-3-00-048000-3
  • Robert F. Multhoff (1961), "Friedrich Wilhelm, Herzog von Braunschweig-Lüneburg-Oels", ; (full text online)  
  • Louis Ferdinand Spehr: Friedrich Wilhelm, Herzog von Braunschweig-Lüneburg-Oels. Meyer, 1848, digitized.

External links

  • At the House of Welf site
Frederick William, Duke of Brunswick-Wolfenbüttel
Cadet branch of the House of Welf
Born: 9 October 1771 Died: 16 June 1815
Regnal titles
Preceded by
Charles William Ferdinand
Duke of Brunswick-Lüneburg
Prince of Brunswick-Wolfenbüttel

Succeeded by
Duchy conquered by France and annexed to Westphalia
Preceded by
Duchy established
Duke of Brunswick
Succeeded by
Charles II
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