Teotihuacan's main avenue aligned with the sun
Ancient Teotihuacan's main avenue, the Avenue of the Dead, was precisely aligned with solar zenith passages, showcasing its builders' advanced astronomical understanding and integration of celestial events into urban planning.
The ancient city of Teotihuacan in Mexico boasts a remarkable feat of urban planning: its central thoroughfare, the Avenue of the Dead, precisely aligns with significant solar events. Built between 100 BCE and 250 CE, this two-mile avenue deviates 15.5 degrees east of true north. This deliberate angle allowed it to align with the sunset on the dates of solar zenith passages, when the sun passes directly overhead twice a year, around May 18 and July 24.
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