The Inca customarily divided conquered lands into three more-or-less equal parts. One part was for the emperor (the Sapa Inca), one part for the religious establishment, and one part for the communities of farmers themselves. In the 1400s, the Sacred Valley became an area of royal estates and country homes. Once a royal estate was created by an emperor it continued to be owned by descendants of the emperor after his death. The estate of the emperor Yawar Waqaq (c. 1380) was located at Paullu and Lamay (a few kilometers downstream from Pisac); Huchuy Qosqo, the estate of the emperor Viracocha Inca (c. 1410–1438), overlooks the Sacred Valley; the estate of Pachacuti (1438–1471) was at Pisac; and the sparse ruins of Quispiguanca. the estate of the emperor Huayna Capac (1493–1527), are in the town of Urubamba. Most archaeologists believe that Machu Picchu was built as an estate for Pachacuti.