Kulubnarti ("Kulb island") is a 1 mile (1.6 km) long island in northern Sudan. Situated in the Nile, about 100 miles (160 km) south of the Egyptian border, it is part of the village of Kulb.
Until the fifteenth century, Kulubnarti was a remote area. It was one of the last known refuges for Christians in Nubia, while Islam spread to the south. It has been inhabited since the time of the Christian kingdom of Makuria, approximately 1100 AD.
Though continuously inhabited from the eleventh century to modern times, it is the only Nubian location which has demonstrated through archaeologically investigation a continuous occupation from the Middle Ages to modern history. Kulubnarti has archaeological and anthropological significance because it has been subjected to one of the only systematic excavations of any site along the southern portion of the Nile. The primary motivation for excavation at Kulubnarti was to increase awareness and understanding of the cultural transition from Christianity to Islam in ancient Nubia. Nubia converted to Christianity by the late 6th century and Christianity prevailed as the dominant religion of the region until the 14th century when Moslems gained control of territory south of the 3rd Cataract. Christianity however, persisted into the 15th century in many regions lying north of the 3rd Cataract, including Kulubnarti. Prior to the archaeological study of Kulubnarti, this cultural transition was almost completely unknown archaeologically and only a few historical references were in existence.
Kulubnarti is an island located around 120 kilometres (75 mi) southwest of Wadi Halfa. It sits just north of the Dal Cataract, which is situated between the 2nd and 3rd Cataracts. The isle is in the Batn-El-Hajar region, a rugged, barren, and rocky area. The usual wide zone of alluvial fertile farmland on the banks of the Nile is missing; only small sections of the island are available for agriculture. The population lives mainly in the modern village at the north and south ends of the island. The altitude is about 200 metres (660 ft) above sea level. There were several villages on this island, with castles, kourfas, houses, and churches.
Before building of the Aswan High Dam, Kulubnarti was an island only at the season of the high Nile flood This remains true today in the sense that it is an island only when the level of Lake Nubia (the Aswan High Dam reservoir) is at its peak.