Why did the sumerians beilive the gods could use the ziggurat to descend to earth?

The Sumerians believed that ziggurats served as a bridge between the heavens and Earth, allowing the gods to descend and interact with the human realm. These massive structures were designed to elevate temples closer to the sky, symbolizing the connection between the divine and the terrestrial. The ziggurat's height and grandeur reflected the importance of the gods in Sumerian culture, and they were seen as the focal point for religious rituals and offerings meant to appease these deities.