The Tiwanaku polity (Spanish: Tiahuanaco or Tiahuanacu) was a Pre-Columbian polity in western Bolivia based in the southern Lake Titicaca Basin. Tiwanaku was one of the most significant Andean civilizations. Its influence extended into present-day Peru and Chile and lasted from around 600 to 1000. Its capital was the monumental city of Tiwanaku, located at the center of the polity's core area in the southern Lake Titicaca Basin. This area has clear evidence for large-scale agricultural production on raised fields that probably supported the urban population of the capital. Researchers debate whether these fields were administered by a bureaucratic state (top-down) or through a federation of communities with local autonomy (bottom-up; see review of debate in Janusek 2004:57-73). Tiwanaku was once thought to be an expansive military empire, based mostly on comparisons to the later Inca Empire. However, recent research suggests that labelling Tiwanaku as an empire or even a state may be misleading. Tiwanaku is missing a number of features traditionally used to define archaic states and empires: there is no defensive architecture at any Tiwanaku site or changes in weapon technology, there are no princely burials or other evidence of a ruling dynasty or a formal social hierarchy, no evidence of state-maintained roads or outposts, and no markets.
Tiwanaku was a multi-cultural network of powerful lineages that brought people together to build large monuments. These work feasts integrated people in powerful ceremonies, and this was probably the central dynamic that attracted people from hundreds of kilometers away, who may have traveled there as part of llama caravans to trade, make offerings, and honor the gods. Tiwanaku grew into the Andes' most important pilgrimage destination and one of the continent's largest Pre-Columbian cities, reaching a maximum population of 10,000 to 20,000 around 800.
