Influential citizens of the French city of Lyon embraced the cause of expansion during the nineteenth century. Religious zeal led to the founding of the Oeuvre de la Propagation de la Foi during the Restoration, and local Catholics continued to lend fervent support to overseas missionary endeavors. But even when the religious impulse towards expansion stood at its zenith, the Lyonnais did not overlook the more concrete advantages to be secured through the acquisition of Algeria and the opening of China to Western trade. Economic motivation took on far more importance during the second half of the century when the devastation of French sericulture by pebrine forced the magnates of the silk industry, the most important local industry and the only French industry dominant in the international market, to look elsewhere for new supplies of raw silk. The Far East, the world's greatest silk-producing region, became the focus of attention, and the Lyon Chamber of Commerce, the most effective local organization devoted to the cause of imperialism, supported the opening of Japan, called for the wringing of new concessions from China, and backed the acquisition and development of Indochina. Just as within the larger pattern of French municipal imperialism the business communities of Bordeaux and Marseille acquired vital stakes in West Africa and North Africa, so also Lyon's business community came to play a pivotal role in French undertakings in Eastern Asia where the Lyonnais soon pushed their activities beyond the confines of the all-important silk trade.