postscript regarding the hypothetical Chakana plaza and sanctuary at Sipan in around 3 500 BP
The diagonal distance of the fire poles representing a solar period of 81 years would also represent a lunar period of 1002 moons or lunations or synodic months, in smaller numbers 334 moons for 27 years, according to the following astronomical sequence relating moons (first number) to years (second number)
37/3 (plus 99/8) 136/11 235/19 334/27
99 moons for 8 years -- Lascaux; Sumer and Akkad 136 moons for 11 years -- Mallia 235 moons for 19 years -- Knossos 334 moons for 27 years -- Sipan ?
The fire poles mark a square, one diagonal representing 81 years, the other 1002 lunations. The Chakana plaza and sanctuary would then be a lunisolar complex, worhshipping th earth goddess Pachamama in her mythical union with the sky of moon and sun above.