Xingu people are indigenous people of Brazil living near the Xingu River. They have many cultural similarities despite their different ethnologies. Xingu people represent fifteen tribes and all four of Brazil's indigenous language groups, but they share similar belief systems, rituals and ceremonies. Precolumbian history The Upper Xingu region was heavily populated prior to European and African contact. Densely populated settlements developed from 1200 to 1600 CE. Ancient roads and bridges linked communities that were often surrounded by ditches or moats. The villages were pre-planned and featured circular plazas. Archaeologists have unearthed 19 villages so far. Post-contact history Kuikuro oral history says Portuguese slavers arrived in the Xingu region around 1750. Xinuguano population was estimated in the tens of thousands but was dramatically reduced by diseases and slavery by Portuguese. In the centuries since the penetration of the Europeans into South America, the Xingu fled from different regions to avoid the spread of deadly disease and enslavement by the Portuguese. By the end of the 19th century, about 3,000 natives lived at the Alto Xingu, where their current political status has kept them protected against foreign intruders. By the mid twentieth century this number had been reduced by foreign epidemic diseases such as flu, measles, smallpox and malaria to less than 1,000. Only an estimated 500 Xingu peoples were alive in the 1950s. The Brazilian Villas-Bôas brothers visited the area beginning in 1946, and pushed for the creation of the Parque Indígena do Xingu, eventually established in 1961. Their story is told in a film, Xingu. The number of Xingu living there in 32 settlements has risen again to over 3000 inhabitants, half of them younger than 15 years. The Xingu living in this region have similar habits and social systems, despite different languages. Specifically, they consist of the following peoples: the Aweti, Kalapalo, Kamaiurá, Kayapó, Kuikuro, Matipu, Mehinako, Nahukuá, Suyá, Trumai, Wauja and Yawalapiti. Intertribal relations The different tribes comprising the Xingu have not been reported to battle each other in war. The only violence seen between the groups are murders from witchcraft, wrestling matches that take place either between people of the same tribe or between people of different tribes as a means of letting people release the anger they have towards one another, and defending themselves from invasions from other tribes. The Xingu classify people into three different categories that they believe exist because the Sun gave