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
Duke of Bourbon had denied him the Bourbon inheritance and the inheritance of his wife, the sister of Charles IV, Duke of Alençon. Charles's son, Antoine, would become King of Navarre, and his grandson, Henry, would become King of France. All of the present-day family members descend from him. As the new reigning dynasty, the House of Bourbon-Vendôme was simply called the House of Bourbon. The title was vacant from 1523 to 1544. In 1523, Louise of Savoy, mother of King Francis I of France, challenged the succession to the estate of Suzanne, Duchess of Bourbon, who died childless. She claimed the succession