I
City (pop., 2000: 629,208), capital of San Luis Potosí state, Mexico.
Situated on the central plateau, it is about 6,100 ft (1,850 m) above sea level. Founded as a Franciscan mission in 1583 and made a city in 1658, it was the centre of the region's colonial administration. It was the site of Francisco Madero drew up the basic social and political program of the {{link=Mexican Revolution">Mexican Revolution in the city. It is the hub of a rich silver mining and agricultural region and is a leading manufacturing, metal smelting, and refining centre.
II
State (pop., 2000: 2,299,360), northeastern Mexico.
It has an area of 24,351 sq mi (63,068 sq km), and its capital is San Luis Potosí . It is a fertile area, and crops are cultivated in the uplands and in the lower tropical valleys. Livestock raising is important, and hides, tallow, and wool are exported. Some of the richest silver mines in Mexico are located in the state.