Guillaume d'Hauberat was a French architect and builder. Among other things, he was the Court Architect to Charles III Philip, Elector Palatine.

In 1716 the Parisian architect Robert de Cotte

Robert de Cotte

Robert de Cotte was a French architect-administrator, under whose design control of the royal buildings of France from 1699, the earliest notes presaging the Rococo style were introduced. First a pupil of Jules Hardouin-Mansart, he later became his brother-in-law and his collaborator...

 brought him to Bonn

Bonn

Bonn is the 19th largest city in Germany. Located in the Cologne/Bonn Region, about 25 kilometres south of Cologne on the river Rhine in the State of North Rhine-Westphalia, it was the capital of West Germany from 1949 to 1990 and the official seat of government of united Germany from 1990 to 1999....

 to support the construction projects of the Cologne

Cologne

Cologne is Germany's fourth-largest city , and is the largest city both in the Germany Federal State of North Rhine-Westphalia and within the Rhine-Ruhr Metropolitan Area, one of the major European metropolitan areas with more than ten million inhabitants.Cologne is located on both sides of the...

 elector

Prince-elector

The Prince-electors of the Holy Roman Empire were the members of the electoral college of the Holy Roman Empire, having the function of electing the Roman king or, from the middle of the 16th century onwards, directly the Holy Roman Emperor.The heir-apparent to a prince-elector was known as an...

, Joseph Clemens of Bavaria

Joseph Clemens of Bavaria

Joseph Clemens of Bavaria was a member of the Wittelsbach dynasty of Bavaria and Archbishop-Elector of Cologne from 1688 to 1723.-Biography:...

.

Hauberat was involved in several German major structures, including the planning and / or execution of:

• Mannheimer Schloss
  Mannheim Palace
  Mannheim Palace is a large Baroque palace in Mannheim, Baden-Württemberg, Germany. It was originally the main residence of the Prince-electors of the Electoral Palatinate...
  
   (next to Versailles
  Versailles
  Versailles , a city renowned for its château, the Palace of Versailles, was the de facto capital of the kingdom of France for over a century, from 1682 to 1789. It is now a wealthy suburb of Paris and remains an important administrative and judicial centre...
  
   the largest Baroque
  Baroque
  The Baroque is a period and the style that used exaggerated motion and clear, easily interpreted detail to produce drama, tension, exuberance, and grandeur in sculpture, painting, literature, dance, and music...
  
   building in Europe)
• Schloss Schwetzingen
  Schwetzingen Castle
  Schloss Schwetzingen, or Schwetzingen Castle is a palace in the German state of Baden-Württemberg. Schwetzingen was the summer residence of the Electors Palatine Karl III Philip and Charles Theodore. It is situated in Schwetzingen, roughly equidistant from the electors' seats at Heidelberg and...
  
   (the summer residence of the Palatinate Electors)
• Poppelsdorfer Schloss in Bonn (also known as Clemensruhe Schloss)
• Schloss Kirchheimbolanden
• Palais Thurn and Taxis in Frankfurt am Main