Cusco picture - The first Spaniards arrived in the city on November 15, 1533. Spanish conquistador Francisco Pizarro, officially discovered Cuzco on March 23, 1534, naming it the "Very noble and great city of Cuzco". The many buildings constructed after the Spanish conquest are of Spanish influence with a mix of Inca architecture, including the Santa Clara and San Blas barrios. The Spanish undertook the construction of a new city on the foundations of the old Inca city, replacing temples with churches and palaces with mansions for the conquerors. During the colony, the city of Cuzco was very prosperous thanks to the agriculture, cattle raising, mining as well as the trade with Spain. This allowed the construction of many churches and convents, and even a Cathedral, University and an Archbishopric. Often, Spanish buildings were juxtaposed atop the massive stone walls built by the Inca.