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
House of Bourbon at least from the beginning of the 13th century, when the estate of Bourbon was ruled by the Sire de Bourbon who was a vassal of the King of France. The term House of Bourbon ("Maison de Bourbon") is sometimes used to refer to this and the House of Bourbon-Dampierre, the second family to rule the seigneury. In 1272, Robert, Count of Clermont, sixth and youngest son of King Louis IX of France, married Beatrix of Bourbon, heiress to the lordship of Bourbon and member of the House of Bourbon-Dampierre. Their son Louis was made Duke of Bourbon in 1327.