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The Stone of Twelve Angles. The palace Hatunrumiyoc (Cuzco) was built by Inca Sinchi Roca, the most important thing about this palace is the Lienzo pétreo which is a beautiful wall which bends backwards, built out of green stone, here you will find the famous Stone of Twelve Angles. This is an example of Inca skill with polygonal masonry.

The number twelve... Just a coincidence?
Twelve months of the year, 12 hours of a clock, 12 tribes of Israel, 12 apostles of Christ, 12 constellations of the Zodiac, 12 Gods on Mount Olympus, 12 inches to the foot, 12 edges of a cube or octahedron, 12 vertices or corners of the icosahedron, 12 faces of the dodecahedron, 12 volts in car electrical system, 12 books of Virgil's Aeneid, 12 is the product of the first three factorials, 12 the atomic number of magnesium, 12 function keys on most PC keyboards (F1, F2,...F12), 12 dialing keys in any standard digital telephone (1, 2, 3, 4, 5, 6, 7, 8, 9, 0, * and #), 12 grades at school........

More puzzles:
  Puzzles: Table of Content
  Nazca Lines: Condor,
  Nazca Lines: The Monkey,
  Nazca Lines: The Spider,
  Machu Picchu,
  Sierpinski Triangle and Machu Picchu,
  The Stone of twelve angles,
  The Lord of Sipan,
  The Lord of Sipan: Spiderman,
  Butterfly Theorem,
  Bevan Point,
  Ceva's Theorem,
  The Raft of the Medusa,
  The Raft of the Medusa (Chinese version),
  The Raft of the Medusa(Spanish version),
  Euler's Formula,
  Morley's Theorem,
  Nagel Point,
  Newton's Theorem,
  Pentagons & Pentagrams