Yupanqui was a son and successor of Mayta Cápac while his elder brother Cunti Mayta became high priest. In legend, Yupanqui is a great conqueror; the chronicler Juan de Betanzos says that he was the first Inca to conquer territory outside the valley of Cuzco—which may be taken to delimit the importance of his predecessors. He subjugated the Cuyumarca and Ancasmarca. Garcilaso de la Vega reports that he improved the city of Cuzco with many buildings, bridges, roads and aqueducts.