Having been sent by Francisco Pizarro from Peru and having made the long journey from Cuzco, Extremadura conquistador Pedro de Valdivia reached the valley of the Mapocho on 13 December 1540. The hosts of Valdivia camped by the river in the slopes of the Tupahue hill and slowly began to interact with the Picunche people who inhabited the area. Valdivia later summoned the chiefs of the area to a parliament, where he explained his intention to found a city on behalf of the king Carlos I of Spain, which would be the capital of his governorship of Nueva Extremadura. The natives accepted and even recommended the foundation of the town on a small island between two branches of the river next to a small hill called Huelén.