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Pumapunku is a large temple complex located in Tiwanaku, Bolivia. In Aymara, the name Puma Punku means, “The Door of the Cougar”. It is situated near the south eastern shore of Lake Titicaca, and sits on a plateau in the Andes at roughly 12,600 feet elevation. Pumapunku’s construction is generally argued to have taken place beginning around 200 BC. The temple itself stood at least 56 feet tall and took up an area of 164 square feet while the overall site and the surrounding constructions, namely the pyramid which the ruins sit on, extend over half a kilometer in length. At its peak, Pumapunku is thought to have been “unimaginably wondrous,” adorned with polished metal plaques, brightly colored ceramic and fabric ornamentation, and trafficked by costumed citizens, elaborately dressed priests and elites decked in exotic jewelry. Our understanding of this complex is limited due to its age, the lack of a written record, and the current deteriorated state of the structures due to looting, stone mining for building stone and railroad ballast and natural weathering. The technological innovation and the beautiful stonework that went into the creation of Pumapunku have drawn comparisons to the Egyptian pyramids, Stonehenge and Easter Island.

Determining the age of these ruins has been a focus of researchers since the site’s discovery. Currently archaeologists date the beginning of the Tiwanaku culture to some time around 1500 BC, and the construction of the Pumapunku complex to around 200 BC. Previously, in the early 1900s, Bolivian engineer Arthur Posnansky, based on astronomical alignments, concluded that Tiwanaku was constructed as early as 15,000 BC (17,000 BP), possibly even older and was not an original construction of the Tiwanaku. In the 1930s, German astronomers from the University of Bonn; Rolf Muller, Hanns Lundendorff, Friederich Becker, and Arnold Kohlshutter came to conclusions similar to Posnansky’s estimate. However, as noted by Kolata subsequent archaeological research, has found a complete lack of any physical evidence, including prehistoric tools and dated midden deposits, for any occupation of the Tiwanaku site as old as argued by Posnansky and the German astronomers either at the Tiwanaku Site, near it, or in direct association with the Pumapunku complex despite decades of intensive excavation and research.

The processes and technologies involved in the creation of these temples are still not fully understood by modern scholars. Our current ideas of the Tiwanaku culture hold that they had no writing system and also that the invention of the wheel was most likely unknown to them. The architectural achievements seen at Pumapunku are striking in light of the presumed level of technological capability available during its construction. Due to the monumental proportions of the stones, the method by which they were transported to Pumapunku has been a topic of interest since the temple’s discovery. The stones are argued to have been transported up a steep incline from a quarry near Lake Titicaca roughly 20 miles away. Some of the blocks are said to weigh in the range of 100–130 tons.

Recreated drawing of interlocking stone blocks

One notable block has been measured at 36 feet long, 16 feet wide and 6 feet thick. Archaeologists argue that this was accomplished by the large labor force of ancient Tiwanaku. Several theories have been proposed as to how this labor force transported the stones although these theories remain speculative. Two of the more common proposals involve the use of llama skin ropes and the use of ramps and inclined planes.

In assembling the walls of Pumapunku, each stone was finely cut to interlock with the surrounding stones and the blocks fit together like a puzzle, forming load-bearing joints without the use of mortar. One common engineering technique involves cutting the top of the lower stone at a certain angle, and placing another stone on top of it which was cut at the same angle. The precision with which these angles have been utilized to create flush joints is indicative of a highly sophisticated knowledge of stone-cutting and a thorough understanding of descriptive geometry.[2] Many of the joints are so precise that not even a razor blade will fit between the stones. Much of the masonry is characterized by accurately cut rectilinear blocks of such uniformity that they could be interchanged for one another while maintaining a level surface and even joints. The blocks were so precisely cut as to suggest the possibility of prefabrication and mass production, technologies far in advance of the Tiwanaku’s Incan successors hundreds of years later. Tiwanaku engineers were also adept at developing a civic infrastructure at this complex, constructing functional irrigation systems, hydraulic mechanisms, and waterproof sewage lines.

Demonstration of the building block technique

To sustain the weight of these massive structures, Tiwanaku architects were meticulous in creating foundations, often fitting stones directly to bedrock or digging precise trenches and carefully filling them with layered sedimentary stones to support large stone blocks. Modern day engineers argue that the base of the Pumapunku temple was constructed using a technique called layering and depositing. By alternating layers of sand from the interior and layers of composite from the exterior, the fills would overlap each other at the joints, essentially grading the contact points to create a sturdy base.

Notable features at Pumapunku are I-shaped architectural cramps, which are composed of a unique copper-arsenic-nickel bronze alloy. These I-shaped cramps were also used on a section of canal found at the base of the Akapana pyramid at Tiwanaku. These cramps were used to hold the blocks comprising the walls and bottom of stone-line canals that drain sunken courts. I-cramps of unknown composition were used to hold together the massive slabs that formed Pumapunku’s four large platforms. In the south canal of the Pumapunku, the I-shaped cramps were cast in place. In sharp contrast, the cramps used at the Akapana canal were fashioned by the cold hammering of copper-arsenic-nickel bronze ingots. The unique copper-arsenic-nickel bronze alloy is also found in metal artifacts within the region between Tiwanaku and San Pedro de Atacama during the late Middle Horizon around A.D. 600-900.

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I am interested in a lot of stuff and do research almost all of the time in stuff that is starnge... well I thought why not educate the world? Like Einstein, I support sharing knowledge!

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