Which ancient Mesoamerican city is remembered primarily for its "Pyramid of the Sun" and collapsed around 800 CE?

The ancient Mesoamerican city known for its "Pyramid of the Sun" is Teotihuacan, which serves as a significant archaeological and cultural site. This city, which flourished from around 100 CE to 800 CE, is notable for its monumental architecture, extensive urban planning, and the vast size of its pyramids, including the Pyramid of the Sun and the Pyramid of the Moon.

Teotihuacan was one of the largest cities in the ancient world and served as a major cultural and economic center in Mesoamerica. The city was characterized by its grid layout, prominent religious structures, and its influence on successive cultures in the region. The Pyramid of the Sun, in particular, is one of the largest in the world and continues to be an important symbol of ancient Mesoamerican civilization.

The chronology of Teotihuacan also aligns with its remarkable features, as the city experienced a decline that led to its collapse around the early 8th century CE, about 800 CE. This timeline solidifies Teotihuacan's historical significance as a major hub in Mesoamerican history, particularly for its architectural and urban innovations, which influenced later civilizations.