Bishop Jorge Alberto Ossa Soto. Perhaps that is why this district acquired the nickname The City Religious' . Its history is full of events and characters that defined their Catholic vocation and, therefore, many of its attractions are related to religious tourism: the Cathedral, chapels and monuments that show the fervor that has characterized the santarosan people. Santa Rosa is a great producer of milk and water for the metropolitan area of Aburrá Valley, which has enabled the construction of reservoirs as the Lakes Riogrande I and II . Discovery and colonization of Valle De Los Osos Marshal Jorge Robledo arrived in nearby Anzá in September 1541, from this place he sent several commissions, including one led by Captain Francisco Vallejo. This came with 40 men heading for the "Llanos de Ovejas" (Current district of San Pedro de los Milagros), the same San Pedro and Entrerríos. Then, later that same year he discovered a very cold temperature valley which he called "" Bear´s Valley "" by many who found. This valley was inhabited by indigenous Nutabes that forced to Vallejo to leave the industry because of the hostilities shown by the native people. How these Indians did not appear to abundant wealth, "the Bear´s Valley" not made interesting for the ambitious Spanish conquerors; they left in oblivion this place for nearly a century. The apparent poverty of the inhabitants, the Spaniards led to believe that the earth lacked precious minerals and the territory remained "virgin" and state neglect for a long time; although Don Andres De Valdivia and Don Gaspar De Rodas visit in the mid-sixteenth century the Valley of the Bears in the office of governor of the city of Santa Fe de Antioquia; territory to which it belonged at the time. The first colonizations occurred at the hands of Pedro Gutierrez Colmenero (first mayor of the town of Medellin (1675)) and Don Antonio De Mesa, both natives of Jerez with Juan Nuño De Sotomayor discovered in 1645 the minerals of the valley and began operating in the streams: San Juan, La Trinidad, Orobajo, San Jose, San Antonio, Santa Ana and San Lorenzo. How also in the Guadalupe River and Los Martires stream. While Gutierrez Colmenero toiled these mines, Fernando Toro Zapata, captain and official judge of the royal house of the city of Santa Fe de Antioquia, came to work the mines of the Caruquia stream The Rancheria