How did the Zollverein help Luxembourg industrialize?

Luxembourg’s transition from an agricultural country to an industrial one was significantly facilitated by its entry into the Prussian-led Zollverein (Customs Union) in 1842.12

Although the grand duchy entered the union against its own will, it soon recognized the economic advantages of the partnership. Membership in the Zollverein provided a framework that encouraged industrial growth and modernization, specifically by fostering infrastructure development. During this period, Luxembourg’s road network was extended and improved, and the foundation was laid for the country's railway system. This economic integration helped transform the nation's industrial capacity, eventually establishing the metallurgical industry—particularly the production of cast iron and steel—as a cornerstone of the Luxembourgish economy.123