The mountain, located near Llallagua, turned out to be richer in minerals than anyone had imagined. Although the first several years of work yielded little, the turning point came in 1900 when Patiño located a very rich vein of tin, later called "La Salvadora" (The Savior). Over the next 10 years he built up the control of nearby mines and other important mines in Bolivia, including Catavi, Siglo XX, Uncia and Huanuni. By the 1920s he had also bought out Chilean interests in his mining company and went on to buy tin smelters in England and Germany. By the 1940s he controlled the international tin market and was one of the wealthiest men in the world, hence his "title" The Tin King (Rey del Estaño).
