Both monumental structures were built in capital cities as places to worship; the Aztec structure was a pyramid that signified two gods, whereas the Inca structure was rounded and signified one god.

These monumental structures, the Aztec pyramid and the Inca round structure, were both built in the capital cities of their respective civilizations as places of worship.

The Aztec structure, known as the Templo Mayor, was a prominent pyramid located in the heart of Tenochtitlan, the capital city of the Aztec Empire. It was dedicated to two important deities in Aztec religion - Huitzilopochtli, the god of sun and war, and Tlaloc, the god of rain and fertility. The pyramid was constructed in multiple stages, each representing a different aspect of the gods' domains. The Templo Mayor served as a ceremonial center and a symbol of power and religious authority.

In contrast, the Inca structure, known as Coricancha or the Temple of the Sun, was located in the capital city of Cusco in the Inca Empire. This structure was unique in its rounded and cylindrical shape, with finely crafted masonry. Coricancha was primarily dedicated to Inti, the Inca sun god. The Inca civilization regarded the sun as a supreme deity, responsible for the prosperity and well-being of their empire. As a result, the Temple of the Sun held great religious and political significance as it symbolized the connection between the ruling Inca monarchs and the divine.

While both structures were built as religious centers and represented significant deities in their respective civilizations, the Aztec pyramid emphasized the worship of two gods, whereas the Inca round structure highlighted the worship of one supreme god. These architectural differences reflect the diverse religious beliefs and customs of the Aztecs and Incas.