He was from a French refugee family, who after the revocation of the Edict of Nantes by Louis XIV had to leave France and went to Hessen under Landgrave Charles.
After beginning studies in Stockholm, Sweden, from 1746 to 1748 he was disappointed in his teacher Carl Hårleman and left for Paris to attend the architectural school of Jacques-François Blondel (École des Art) in 1748–52.
After further educational trips in France and to Italy he returned to Kassel, Germany and became chief architect on the court after the death of this father.
[2] Under Frederic of Hessen he was responsible for the transformation of the old and partly destroyed town of Kassel into a modern capital.
[citation needed] Simon Louis du Ry designed and executed many castles and palaces including: