Summary The present contribution explores the extent of influence which French law had on the development of Germany’s commercial courts in the nineteenth century. Modern literature describes this influence as marginal, yet without further proof. The author takes this state of research as a starting point to compare the Napoleonic legislation on commercial courts with the German commercial court systems of the nineteenth century. However, the present contribution will start with an overview of the German legal situation at the end of the eighteenth century. This is followed by an examination of whether French law was transferred to Germany during the French occupation of large parts of Germany at the beginning of the nineteenth century. Against this background it is possible to fully analyse the influence which French law had on the further development of German commercial courts.