The ancient civilization known for their polytheistic beliefs and monumental architecture is the ancient Egyptians. Centered around the Nile River, ancient Egypt thrived for thousands of years and developed complex religious practices centered on a pantheon of gods and goddesses, such as Ra, Isis, and Osiris. Their belief in the afterlife led them to construct elaborate tombs, most famously the pyramids, which served as monumental burial sites for pharaohs. The Great Pyramid of Giza remains one of the Seven Wonders of the Ancient World. Ancient Egyptian culture also made significant advances in writing, medicine, and art, influencing later civilizations in various ways.