Upper Egypt (Arabic: صعيد مصر Ṣaʿīd Miṣr, shortened to الصعيد, Egyptian Arabic pronunciation: [es.sˤe.ˈʕiːd], locally: [es.sˤɑ.ˈʕiːd]; Coptic: ⲙⲁⲣⲏⲥ, romanized: Mares) is the southern portion of Egypt and is composed of the lands on both sides of the Nile that extend upriver from Lower Egypt in the north to Nubia in the south. In ancient Egypt, Upper Egypt was known as tꜣ šmꜣw, literally "the Land of Reeds" or "the Sedgeland". It is believed to have been united by the rulers of the supposed Thinite Confederacy who absorbed their rival city states during the Naqada III period (c. 3200–3000 BC), and its subsequent unification with Lower Egypt ushered in the Early Dynastic period. Upper and Lower Egypt became intertwined in the symbolism of pharaonic sovereignty such as the Pschent double crown. Upper Egypt remained as a historical region even after the classical period.