Global silver trade from the 16th to 18th centuries which China desired, so they traded silver to make up for their trade deficit. The two most important mining colonies of the Spanish Empire were Peru and Mexico, who were estimated to have provided one-hundred thousand tons of silver from the mid 16th Century to the end of the colonial period. The richest, and most productive mine in the Americas was that of Potosí in what is modern day Bolivia. The richest camp in Mexico was in the city of Zacatecas, however the production of this mine was far less than that of Potosi. More simplistic native mining techniques dominated
Aztec Club of 1847 Pennsylvania home but, at President Grant's offer, in 1874 the meeting was held at the White House. Patterson's mansion was located on the southwest corner of 13th and Locust Streets. After his death in 1881, the Historical Society of Pennsylvania purchased the mansion as its permanent home. The mansion was demolished between 1905 and 1909 and a new building dedicated in 1910. At the Annual Meeting held at Hotel Bellevue, Philadelphia, on September 14, 1881, Ulysses S. Grant was elected Vice President of the Aztec Club, announcing his intention to become its president. Following the War of the Rebellion (America's