GRESTAC
This channel publishes research findings on polygonal (polycurved) masonry, the Nazca lines, and other constructions of ancient civilizations from various regions of the world.

Tool marks on the sarcophagus of the Headless Pyramid

Hidden and Explicit Rules of Polygonal Masonry

The Geometry of Precision: On the Role of Bevels

The Abu Rawash Artifact: Evidence for the Existence — or Absence of Circular Saws in Ancient Egypt?

Ancient stone cuts at Ollantaytambo, Peru #history #ancient #incas

What are nubs? Classification. Properties. Origin. #history #ancient #incas

Unfinished sarcophagus. Part 2 The lost art of hardening copper

Multidisciplinary Analysis of Ancient Egyptian Stone Vessels

A technical analysis of the unfinished sarcophagus reveals new insights.

Facts about geopolymers in Peru and Bolivia. And what alternatives? #history #ancient #incas

Researching Ancient Technology p.2_b Polygonal complexes #ancienttechnology #history #archaeology

Researching Ancient Technology p.1 Polygonal Masonry, Why not Geopolymer? #history #incas

Researching Ancient Technology p.2_a Polygonal complexes: Buildings #megalithic #incas #history