Ashtronort – History's Mysteries

Let's take a stroll through insanity…

Precision Fitting of Massive INCAN Blocks…


When we consider the evolution of the techniques used by our ancestors to build stonewalls, we imagine that they began with the crude cowan style wall built from roughly hewn blocks, full of gaps & signs of imperfections, progressing over time to building horizontally squared walls” from 90’ right angled blocks, that sat flushly on top of each other – stable & enduring. These two styles could be viewed as being the alpha & omega points of humankind’s knowledge of fitting building blocks together.

In Europe the blocks in cowan styled walls were never fitted flushly together, they were by definition cowan in nature, not perfect by any measure of capability or intention. However, when we look around the various ruins and remains of the South American continent, we are confronted with some of the most flamboyant, if not the most boastful manipulations of monolithic stones to be found anywhere in the world.

This flower pattern below from TARAHUASI centres around a stone block with 8 sides…

ANIM - 8 sided stone in Incan flower pattern at Tarahuasi Limatambo

…The ancient Incan stone walls of Sacsayhuaman, which were built using multi-faceted blocks weighing several tonnes, appear to have been built randomly, as if in a process of chaos, without any design, but then you have to ponder the precision of the workmanship needed to achieve the flawlessly flush joints between the massive polygonal blocks which have been perfectly fitted together without mortar, each block flushly matching the edges of its neighboring blocks, fitted together with what seems to be an apparent ease expressed continuously across a very large complex?

PANO - Sacsayhuaman Ruins outside of Cuzco, Peru

The sides of the multi faceted blocks fit very snuggly together. The urban myth of not being able to slide a knife between the fitted blocks rings true here. The ancient “Incans” without metal tools or the wheel managed to shape & move these massive stone blocks with a high standard of accuracy that is basically baffling. I wonder how they made the block’s sides so perfectly receptive of each other? Did they shape the blocks before they put them in place?, or did they shape the blocks as part of the process of actually putting them in place? Did the builders raise these huge burdensome blocks using pulleys or hoists, or did they use the log stacking method suggested in most theories.


PANO - sacs asad

PANO - Inca Stone Work at Sacsayhuaman

PANO - dsc_1022 by happyinquito

In the photo BELOW you can see the true scale of these huge blocks pitted against the tourist posing for a snap shot… THEY ARE MASSIVE BLOCKS, cut to fit precisely together and moved  & positioned with apparent ease, time and time again!

PANO - sacsayhuaman_zed


PANO - Sacsayhuaman, Peru

Sacsayhuaman walls 1



How did the builders of these walls manage to carve blocks with which contain both straight edges & curved edges, and seamlessly fit them into these walls with no visible spaces or gaps between them and the neighbouring monolithic sized blocks of stone? …and may I remind you again that these people did not possess any knowledge of metal tools. The only metal they were familiar with was gold, albeit lots of gold, but gold is a very soft metal and absolutely useless for crafting chisels from.


Multi Faceted Monolithic Blocks:

The block BELOW has six sides/edges which all fit flushly with the surrounding six blocks… amazingly, other blocks at the site contain 7, 8, 9, 10 or more sides/edges, all of which are finished with the same high level of craftsmanship…

ANIM - 6 sided stone sacsayhuman

6 sides / edges



ANIM - multi sided blocks cusco machu pichu


ANIM - 7 sided stone inca

7 sides / edges

ANIM - 7 sided stone INCAN

7 sides / edges

ANIM - 8 sided stone PERU

8 sides / edges


ANIM - 8 sided stone Incan PERU

8 sides / edges

ANIM - 8 sided stone inca ollantaytambo cuzco peru

8 sides / edges

ANIM - 10 sided stone at Palace of Inca Roca, Cuzco, Peru - Photo Beto Santillán

10 sides / edges

ANIM - 10 sided stone in inca fortress wall

10 sides / edges

ANIM - 11 sided stone INCA

11 sides / edges

ANIM - 12 sided stone Machu Picchu

12 sides / edges

ANIM - 10 sided stone at Palace of Inca Roca, Cuzco, Peru 2

12 sides / edges


ANIM - 17 sided stone INCA STONEWORK

17 sides / edges


In Britain we marvel at Stonehenge and amplify the brilliance & strenuous achievement of its builders, but the original design of Stonehenge only consisted of approx 85 roughly hewn stone blocks, totalling approx 680 tonnes of rock…


…To put things into context;

The estimated volume of stone remaining today in the 3 terrace walls at Sacsayhuaman in Peru is over 6,000 cubic meters (approx 16,626 tonnes).

The longest of the three walls at Sacsayhuaman is about 400 m (1,312.3 ft) in length. Today the average height of the walls is approx 6 m (19.6 ft), but these walls were once considerably taller, but the Spanish conquistadors stripped the higher parts of the walls which were constructed from smaller sized blocks, to build most of old Cuzco.

Some historians speculate that the Incans were not responsible for erecting the larger monoliths which form the lower levels of the terrace walls. These historians are of a view that the Incans simply built on top of the larger blocks that they found at the site. They speculate that these larger blocks were erected by a pre-Incan civilisation which remains nameless & lost to history.

The massive stone blocks used in the walls of the three terraces at Sacsayhuaman in Peru are probably the largest stone blocks used in pre-hispanic America.

The stone fitting skills show a level of precision that is unmatched anywhere on the South American continent. The blocks are fitted so closely together that a credit card will not fit between the stones.

In some places where an earthquake has shaken the stones loose, we should pay attention to the fact that the edges of the blocks on either side of the gap run parallel to each other and are a perfect match.


PANO - 91F-Image Three Walls and Valley

BELOW: Estimates for the weight of the largest Andesite monolithic blocks found at Sacsayhuaman vary from 120 tonnes to 200 tonnes.





CLOSE UP - sm-Inca-stonemasonry-and-the-credit-card-test

CLOSE UP - cuzco R

CLOSE UP - Inca archaeological site Ollantaytambo

Stonework. Ollantaytambo. Sacred Valley, Peru.

Stonework. Ollantaytambo. Sacred Valley, Peru

CLOSE UP - Sacsayhuaman gxfdzdfg

CLOSE UP - salkantay-inka-trail-machu-picchu

CLOSE UP - this is a closeup from a wall in Easter Island - the style is almost exactly the same as what I saw in Machu Picchu OllyantaytamboThe smallest stone in the wall.







9 comments on “Precision Fitting of Massive INCAN Blocks…

  1. James Ginn
    December 8, 2016

    Well you cannot cut and carve them to fit these irregular shapes so it seems they would have to be poured in place like cement.


    • SPJ
      January 27, 2018

      I think most of the blocks had nodules that were used for raising the blocks into place. Once the block was shaped and slotted into position, then the nodules were chipped/bashed off, so leaving a smooth face to the block. Look at the photos above and you will see that there are the remnants off TWO flattened nodules at the bottom edge of each block. One of the photos shows a nodule that had not been chipped off, its the photo that looks like a stone nipple.


  2. Peter Dsouza
    June 29, 2017

    I think i know how they did it.. unfortunately if i reveal here, the mystery will no longer remain a mystery. some day i will try to do it myself.


  3. Pingback: Coming Soon ….. – Litter From Amerika

  4. Peter Rosenholm
    May 19, 2018

    I know how this was done, I want credit for disclosing this. Peter Rosen Holm 401-466-4921


  5. Pete Richards
    June 24, 2018

    This is the work of races prior to the Inca. By their time, they had lost the technique of geopolymers and merely made smaller stonework infill to old sections.. The original stones were cast, not quarried. Check the work of Prof. Joseph Davidovits for example.
    The ‘noses’ or protruding nodules were deliberate inclusions to allow the use of access ladders as a means of bringing the material to the cast site. This would be done a basketful at a time.
    I really enjoy this work, and will replicate and publish on it in due course.


    • John Brown
      July 17, 2018

      Do you know what geopolymer is? It’s zeolite, which is nothing like the hardness/strength of stone. You could make a limestone that way, but not granite or andesite. To make the igneous rocks you need to make feldspar, and it’s considerably more difficult than making zeolite, needs heat and pressure. Too low and all you get is zeolite. It’s not hard to tell zeolite from feldspar so somebody would have noticed if there were zeolite stones instead of feldspar ones. Feldspar has a crystalline structure, zeolite is amorphous. Davidovitz never tried to sell his geopolymers as a substitute for igneous stone, to my knowledge.


  6. Tony
    September 19, 2018

    Hah! I know how they cut the stones to fit. It’s so simple. You can do it with nothing but a chisel and hammer with no skill at all. You could probably do it with your eyes closed. Surely someone has thought of this already, there are classic logic problems that are much trickier. I have to google it and find out.


    • Tony
      September 19, 2018

      The more I think about it. The more it seems like a very clever way of fitting stones when you want to minimize the amount of stone cutting that is necessary.


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