The Pyramid of Sun was built during the Tzacualli Phase around 100-200 CE — but here's the puzzle: deeper layers show more advanced craftsmanship than later reconstructions. The oldest levels contain massive blocks fitted with precision unmatched by later work
Pyramid of Sun has five construction phases with advanced earliest craftsmanship

Site mentioned
Key facts
- Pyramid of Sun consists of five distinct construction phases stacked upon each other
- Deeper layers show more advanced craftsmanship than upper reconstructions
- Oldest levels contain massive blocks fitted with precision unmatched by later work
- Restricted zones behind Temple of Feathered Serpent show finely-cut andesite blocks with tighter joints
- Cement used in city is among most durable ancient substances, resisting weathering better than modern concrete
- Builders transported enormous basalt and andesite blocks from quarries dozens of km away without wheels or pulleys
- In 1884, excavations found pyramids buried under up to 12 feet of compacted earth
- Covering earth uniform and dense resembling alluvial flood deposits
Sources
Then and Now: Pyramid of the Sun, Teotihuacan, Mexicoespc.substack.com
The Pyramid of the Sun is the largest building in Teotihuacan, and one of the largest in Mesoamerica. It is believed to have been constructed about 200 CE.
Pyramid of the Sunen.wikipedia.org
The Pyramid of the Sun is the largest building in Teotihuacan, and one of the largest in Mesoamerica. It is believed to have been constructed about 200 AD.
Pyramidsancientengrtech.wisc.edu
The Pyramid of the Sun was built in the Tzacualli Phase, and is thought to be one of the earliest monumental structures built in Teotihuacan. The pyramid is ...
The Temple of the Sunhistoricalmx.org
The most imposing structure at the site of Teotihuacan is the Pyramid of the Sun. It is the third largest pyramid in the world at 65 meters in height.
Pyramid of the Moon and Pyramid of the Sun, Teotihuacansmarthistory.org
The Pyramid of the Moon and Pyramid of the Sun are massive architectural constructions that tell us a lot about Teotihuacan culture.
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