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Lower Nubia is the northernmost part of Nubia, downstream on the Nile from Upper Nubia. Sometimes, it overlapped Upper Egypt stretching to the First and Second Cataracts (the region known to Greco-Roman geographers as Triakontaschoinos), so roughly until Aswan. A great deal of Upper Egypt and northern Lower Nubia were flooded with the construction of the Aswan High Dam and the creation of Lake Nasser. However the intensive archaeological work conducted prior to the flooding means that the history of the area is much better known than that of Upper Nubia. Its history is also known from its long relations with Egypt.
In Upper Egypt and Northern Lower Nubia was present a series of cultures, the Badarian, Amratian, Gerzean, A-Group, B-Group, and C-Group. Linguistic evidence indicates that Cushitic languages were spoken in Lower Nubia, an ancient region which straddles present day Southern Egypt and Northern Sudan, before the arrival of North Eastern Sudanic languages in the Middle Nile Valley. During the Middle Kingdom Lower Nubia was occupied by Egypt, when the Egyptians withdrew during the First Intermediate Period Lower Nubia seems to have become part of the Upper Nubian Kingdom of Kerma. The New Kingdom occupied all of Nubia and Lower Nubia was especially closely integrated into Egypt, but with the Second Intermediate Period it became the centre of the independent state of Kush based at Napata at some point. Perhaps around 591 BC the capital of Kush was transferred south to Meroe and Lower Nubia became dominated by the Island of Meroe.
With the fall of the Meroitic Empire in the fourth century AD the area became home to X-Group, also known as the Ballana culture who were likely the Nobatae. This evolved into the Christian state of Nobatia by the fifth century. Nobatia was merged with the Upper Nubian state of Makuria, but Lower Nubia became steadily more Arabized and Islamicized and eventually became de facto independent as the state of al-Maris. Most of Lower Nubia was formally annexed by Egypt during the Ottoman conquest of 1517, and it has remained a part of Egypt since then, with only the far south being in Sudan.