Final answer:
The Teotihuacan civilization built the Pyramid of the Sun, which is a part of the historically significant city known for its complex structures and cultural importance.
Step-by-step explanation:
The Mesoamerican civilization that built the Pyramid of the Sun was the Teotihuacan. The Teotihuacanos established an impressive city known for its large-scale structures and vibrant cultural life. One of its most famous constructions is the Pyramid of the Sun, a massive multitiered stone structure that stands at 197 feet tall. The city of Teotihuacan, which was home to as many as 125,000 people at its peak, also featured other significant architectures, such as the Pyramid of the Moon, Avenue of the Dead, and the Temple of Quetzalcoatl, commonly referred to as the feathered serpent. The name Teotihuacán was assigned by the Aztecs after the city had been deserted around 550 CE. The extensive and detailed urban layout of Teotihuacan showcases the sophistication of this ancient civilization.