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
Nguyễn dynasty Nguyễn dynasty The Nguyễn dynasty or House of Nguyễn (; Hán-Nôm: , "Nguyễn triều") was the last ruling family of Vietnam. Their rule lasted for 143 years. The dynasty began in 1802, when Emperor Gia Long ascended the throne after defeating the Tây Sơn dynasty. It ended in 1945, when Emperor Bảo Đại abdicated the throne and transferred power to the Democratic Republic of Vietnam. Although the nation was given the name "Việt Nam" (越南) by the Qing Dynasty during Gia Long's reign, it was known as "Đại Việt Nam" (大越南) by nations other than the Qing Dynasty. From the