History of Bolivia to 1809 reduction in silver output. After 1700 only small amounts of bullion from Upper Peru were shipped to Spain. Kings from the Bourbon Dynasty in Spain tried to reform the colonial economy in the mid-eighteenth century by reviving mining. The Spanish crown provided the financial support necessary to develop deeper shafts, and in 1736 it agreed to lower the tax rate from 20 to 10 percent of the total output. The crown also helped create a minerals purchasing bank, the Banco de San Carlos in 1751 and subsidized the price of mercury to local mines. The foundation of an academy of
Jeanne de Bourbon, Duchess of Bourbon eldest son of Robert, Count of Clermont and Beatrix of Bourbon. Beatrix was the heiress of the Bourbon family and the matriarch of the new Bourbon line of the Capetian dynasty. Robert was the youngest son of Louis IX of France and Margaret of Provence. She married first John II, Duke of Bourbon in 1487. The groom was about sixty-one years old and the bride only twenty-two. John had survived two previous wives and his only son. He was in a need of an heir; however, they had only one son: John II died the same year as his second