In 2003, the five Franciscan missions of the Sierra Gorda of Querétaro in Mexico were declared a UNESCO World Heritage Site. These missions were built between 1750 and 1760 by Junípero Serra, who was also the founder of the most important missions in California. These missions are an example of the architectural and stylistic unity with the tempera painting from New Spain Baroque, which is one of the best representations of popular art. The UNESCO inscription of this site as a World Heritage Site is due to it being a testimony of the significant exchange of values that occurred during the colonization of the center and north of Mexico, as well as the west of what is now the territory of the United States.