Looking out for literature on Maya architecture I found this book: The Archaeology of Measurement, edited by Iain Morley and Colin Renfrew, Cambridge University Press 2010 (online as Google book), containing the paper: Teotihuacan city layout as a cosmogram, by Saburo Sugiyama. A quote from Sugiyama's paper: "I conclude that the city layout appears to have been elaborated fundamentally to express a Mesoamerican cosmogenic division of time and space with calendrical, astronomical, or cosmological significance, and that rulers apparently proclaimed divine rulership through the production, reproduction, and use of monuments and cosmic symbols harmoniously integrated into the urban landscape of Teotihuacan."
The pyramids had once been shrines, which were then covered in heaps of rubble and several pyramid layers. The city layout reveals a masterplan. Saburo Sugyama fixed the unit at 83 centimeters and found it in many measurements, combined with calendar numbers, mainly 260. These insights are results of a measuring campaign from 2007. I find Sugiyama's work appealing and convincing. The measurements also confirm my unit of 27.1 centimeters for the pyramids. According to Sugiyama, the Castel may have been associated with Venus. I can confirm his opinion: the small third pyramid of Teotihuacan is the Venus Pyramid, complementing the Sun Pyramid and Moon Pyramid. Here the ideal measurements of the three pyramids, each without stairway and platform.
S U N Pyramid
ideal base 819 by 826 units of 27.1 centimeters ideal periphery of the base 3290 or 14 x 235 units ideal height 235 units (higher out of optical reasons) 235 lunations are 19 years
M O O N Pyramid
ideal base 443 by 531 units of 27.1 centimeters ideal height 148 units (higher out of optical reasons) 148 and 443 and 531 are lunar numbers, representing 5 and 15 and 18 lunations counted in the 30 29 30 29 30 29 30 ... mode
V E N U S Pyramid
ideal base 238 by 240 units of 27.1 centimeters ideal diagonal exactly 338 units triple 238-240-338, basic triple 119-120-169 The number 240 reminds of the 240 Venus years that equal 539 Tzolkin, while the 4 and 4 and 4 platforms of the western plaza evoke the 12 Venus years that equal 7007 days
The sizes of the three pyramids correspond to the brightness of the respective celestial body. The Moon Pyramid, built on a hill, reaches the same height as the Sun Pyramid, according to the equal optical size of sun and moon in the sky.
Next time: the combined units of the pyramids, 27.1 centimeters, and of the city layout, 83 cm, reveal a systematic method for the calculation of the circle based on the calendar number 13 (trecena)