The first Gare du Nord was constructed on behalf of the Chemin de Fer du Nord company, which was managed by Léonce Reynaud, professor of architecture at the École Polytechnique. During 1843, the engineer Onfroy de Bréville, having been placed in charge of the first section of the company's proposed line between Paris and Amiens, produced a report that considered two different options for the terminal station. Management opted to construct the least spacious of the two options, despite the occurrence of stations serving capital city becoming overwhelmed already being a known phenomenon in both London and Brussels. For his part, de Bréville promoted the smaller option as being more than adequate to meet demand and reducing its impact on the existing neighbourhood of Clos Saint-Lazare; it was also considerably cheaper than the larger alternative option.