The Stone of Twelve Angles, the Inca Palace of Hatunrumiyoc, Cuzco, Peru"The stone is in the Lienzo petreo wall, it is an excellent exaple of the Inca's skill with polygonal masonry"

Twelve slabs positioned in a circle, representing the twelve lost provinces in present-day Turkey at the Armenian Genocide memorial complex on Tsitsernakaberd hill, Yerevan, Armenia

Ancient Inca capital Calle Hatunrumiyoc has the most finely constructed Inca walls including the famous twelve sided stone, Cuzco, Peru