The twelve angle stone is located in the street Hatun Rumiyoq ("Of the Rock Mayor") was the palace of Inca Roca, which currently belongs to Archbishop's Palace. Is embedded in a wall stone Inca carved so that it has twelve angles facilitate accurate fit with the other adjacent stones forming the wall.
That's why in addition to being a very special historical element, represents the Inca technology and the degree of precision in the manufacture of its walls. So far it is an amazing archaeological and architectural highlights knowledge possessed by the Incas to build earthquake-resistant structures.
The architecture developed by the Incas is characterized by the simplicity of its forms, its strength, its symmetry and find that its buildings harmonize the landscape. Unlike coastal societies such as the Chimu, the Incas used a fairly sober decoration. The main material used was stone, simpler in construction was placed uncut, but not in the most complex and important. The Incas developed builders lifting techniques enormous walls, true mosaics formed by carved stone blocks that fit perfectly, without including even a needle could pass.