The civilization that built the first known pyramids in the world was the Ancient Egyptians. This remarkable architectural achievement began during the Third Dynasty, with the Step Pyramid of Djoser built around 2670 BCE, designed by architect Imhotep. The construction of pyramids evolved later with the Giza Pyramid Complex, notably including the Great Pyramid of Khufu around 2580 BCE. These structures served as elaborate tombs for pharaohs, reflecting the society's beliefs in the afterlife and the importance of the pharaoh's status. The pyramids symbolized strength, creativity, and advancement in engineering, showcasing the extraordinary capabilities of ancient Egyptian civilization.