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
Bourbon Street city's buildings. The Spanish rebuilt many of the damaged structures, which are still standing today. For this reason, Bourbon Street and the French Quarter display more Spanish than French influence. Following a brief restoration of French rule, the Americans gained control of the colony with the 1803 Louisiana Purchase. They translated the French street names into English, with Rue Bourbon becoming Bourbon Street. During the 19th century, New Orleans was similar to other Southern cities in that its economy was based on selling cash crops, such as sugar and tobacco. By 1840, newcomers whose wealth came from these enterprises turned