Aztec Architecture
The Aztec's architecture is similar to the Maya's, but they have their slight differences. Their buildings may have a resemblance, but of course, each used their own techniques. As mentioned in the Aztec religion page, their beliefs in sacrificing were so strong that they even built a temple especially for this ritual. The only difference between temple and a pyramid is the temple has a flat top and two small compartments in which sacrifices took place, as opposed to the pointed tops. In many instances the Aztecs wanted to improve their temples. In doing so, they would build over the old one. One was found to have been built over six times.
Their architecture was precise due to their magnificent mathematical skills. Each side 
of the pyramid was also positioned according to the solar system. When the sun would hit a pyramid at a time during the day the shade behind would draw the body of a serpent from top to bottom, the size of the actual pyramid. They would also carve serpent's heads at the ends of staircases where the shade of the body would glue itself to the head, like a puzzle. Serpents represented an important symbol to the Aztecs. The reason why the eagle and serpent represent Mexico is because it was the first thing the Aztecs saw when they arrived on the land they settled in.
There was also a palace specifically made for the emperor. It was large and very well decorated. The walls were decorated with carvings, gold panels, and paintings. The stairs were made of marble. The emperor's palace consisted of four main rooms and two floors. Aztec architectural structures include: pyramids, homes, shrines, a palace, and a temple. "Pyramid building stopped after Spanish conquistadors (conquerors) arrived in Central and South America in the AD 1500's." (www.uwgb.edu) All we have left of the Aztec architectures are the surviving pyramids you will find in Mexico.