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| Tiwanaku (archaeological site) | |
|---|---|
| Name | Tiwanaku |
| Native name | Tiahuanaco |
| Caption | Monumental architecture at Tiwanaku |
| Map type | Bolivia |
| Location | Lake Titicaca basin, La Paz Department, Bolivia |
| Region | Altiplano |
| Type | Settlement, ceremonial center |
| Built | c. 400–1000 CE |
| Abandoned | c. 1000–1100 CE |
| Cultures | Tiwanaku culture |
| Condition | Excavated, partial restoration |
| Designation1 | UNESCO World Heritage Site |
| Designation1 date | 2000 |
Tiwanaku (archaeological site) is a major pre-Columbian archaeological complex on the southern shore of Lake Titicaca near the modern town of Tiwanaku in the La Paz Department of Bolivia. The site served as the ceremonial, administrative, and urban center of the Tiwanaku culture during the Middle Horizon and exerted influence across the Andes, including the Altiplano, Cusco Region, and Northern Chile. Tiwanaku features monumental stone architecture, intricate lithic sculpture, and distinctive ceramics that have been central to debates about state formation, long-distance exchange, and ritual economy in western South America.
Tiwanaku lies near Lake Titicaca on the Altiplano plateau within the La Paz Department of Bolivia, situated at over 3,800 meters above sea level. The site occupies seasonally waterlogged soils of the Desaguadero River basin and is proximal to wetlands known as suka kollus and totora reed stands, which supported fishing and reed-craft traditions linked to communities across the Titicaca basin, including Puno Region populations. The high-elevation puna environment shaped agricultural adaptations such as raised-field agriculture associated with the Tiwanaku civilization, and climatic fluctuations related to the Little Ice Age and earlier Holocene events have been invoked to explain demographic and economic transformations around Tiwanaku.
European interest in Tiwanaku began with 16th–19th century travelers like Pedro Cieza de León and reached scientific momentum with 19th-century figures including Charles Wiener and Adolphe Bandelier. Systematic archaeological investigations were advanced by early 20th-century researchers such as Erland Nordenskiöld and Max Uhle, while mid-20th-century work included excavations by Sebastián Izquierdo and restoration efforts influenced by Arthur Posnansky. Late 20th- and early 21st-century projects involved scholars from institutions like the Smithsonian Institution, University of Chicago, and Bolivian Ministry of Cultures collaborating in stratigraphic, radiocarbon, and paleoenvironmental studies. Key methodological advances include radiocarbon dating programs tied to laboratories at University of California, Berkeley, archaeobotanical analyses parallel to work at Royal Botanic Gardens, Kew, and lithic sourcing studies using techniques developed at Los Alamos National Laboratory.
The Tiwanaku complex centers on monumental precincts such as the Akapana Pyramid, the Kalassasaya, the Semi-Subterranean Complex, and the Gate of the Sun, together forming a planned ceremonial core analogous to plazas in other Andean centers like Chan Chan and Cuzco. Stonework at Tiwanaku includes finely dressed andesite monoliths and megalithic lintels that exhibit styles comparable to carved stelae in the Moquegua Valley and sculptural programs found in the Wari horizon. Urban features include orthogonal street grids, residential compounds, and agricultural terraces extending into the surrounding basin akin to settlement patterns documented at Pukara and Qaluyu. Water-management installations and causeways connect ceremonial spaces to surrounding reed beds and raised fields, reflecting integrated landscape engineering comparable to hydraulic works at Cochabamba and irrigation schemes in Arequipa.
Tiwanaku material culture comprises polychrome ceramics, such as the distinctive Tiwanaku-Kelluyo style jars, intricately carved stone stelae including the Ponce Stela and Bennett Monolith, and monumental lithic portals like the Gate of the Sun. Metalwork from the site features alloys and techniques related to Andean metallurgy traditions present in collections at the Museo de la Nación (Peru) and Museo Nacional de Arqueología (Bolivia). Textile fragments recovered in excavations show warp-faced weaves and iconography paralleling patterns from the Nazca and Chavín traditions. Exchange networks are evidenced by obsidian sourcing that links Tiwanaku to sources in the Altiplano of Argentina and Chivay obsidian outcrops, while marine shell and Spondylus remains indicate long-distance trade with coastal regions such as Chimú and Moche domains.
Archaeological and iconographic data suggest Tiwanaku operated as a multiethnic ceremonial polity with ritual specialists, craft specialists, and agricultural communities connected through redistribution systems comparable to models proposed for Inca Empire antecedents. Religious expression centered on iconography depicting anthropomorphic deities, staff-god motifs, and cosmological panels related to highland solar cults also observed in Tiahuanaco iconography motifs present across the Andean highlands. Economy integrated intensive raised-field agriculture, pastoralism with camelid herding, and specialized craft production, with marketplaces and exchange comparable to ethnohistorical accounts from Spanish colonial chronicles. Human offerings, mortuary practices, and carved libation imagery indicate ceremonial practices with parallels in Kallawaya shamanic traditions and ritual calendrical observances.
Tiwanaku's rise is conventionally placed in the Middle Horizon (c. 500–1000 CE) with antecedent occupations at sites like Pukara and subsequent regional transformations that fed into Late Intermediate Period dynamics affecting polities such as Wari and later the Inca Empire. Radiocarbon sequences, ceramic seriation, and architectural phases delineate early formative occupations, a florescence of monumental construction in the 7th–10th centuries CE, and a decline or reorganization after c. 1000 CE coincident with demographic shifts and climatic stressors documented in paleoclimate records from Lake Titicaca cores and Andean glacial chronologies.
Tiwanaku holds UNESCO World Heritage status but faces threats from looting, unregulated tourism, salt efflorescence, and groundwater fluctuations that accelerate stone weathering comparable to conservation challenges at Machu Picchu and Chan Chan. Urban expansion from the nearby town of Tiwanaku and agricultural encroachment threaten peripheral sectors, while climate change impacts on the Altiplano hydrology increase risks to archaeological strata. Conservation responses involve collaborations among the Bolivian Institute of Archaeology, international conservation bodies, local indigenous organizations including Aymara communities, and academic partners to implement site management plans, stabilization of masonry, and community-based heritage programs.
Category:Archaeological sites in Bolivia Category:World Heritage Sites in Bolivia Category:Pre-Columbian archaeology