Ancient Egypt was located in northeast Africa along the Nile River valley. By 3000 BC, Egypt was a unified kingdom that occupied the entire Nile Valley. Egypt was divided into Lower Egypt in the north and Upper Egypt in the south. The Nile River was vital to Egyptian civilization as it provided water for irrigation and transportation. Egyptian culture had a strong influence on architecture, including the construction of temples and pyramids. The Egyptian political system was highly centralized around the pharaoh, who was believed to be a living god. Ancient Egyptian civilization lasted for over 3000 years and made many advances in technology, such as building techniques, shipbuilding, and early writing materials.