The ancient civilization known for building pyramids is Ancient Egypt. This remarkable society flourished along the Nile River for thousands of years, and its most iconic structures are the pyramids, which served as monumental tombs for pharaohs. The most famous of these is the Great Pyramid of Giza, constructed during the Fourth Dynasty around 2580-2560 BC. These pyramids were not only impressive architectural feats but also represented the Egyptians' religious beliefs concerning the afterlife. The elaborate burial practices and grandeur of the pyramids reflect the civilization's advanced knowledge of engineering, mathematics, and astronomy.