In the mid-seventh century, Egypt was conquered by Muslim armies. The pressure of the invading army, advancing south along the Nile Valley, stopped the Christian kingdom of Makuria. The relics of this civilization have been discovered by Poznań archaeologists in the area of the Letti Basin, about 350 km north of Khartoum. Makuria was a powerful kingdom, which existed from the sixth to the fourteenth century between II and V cataracts of the Nile. For several centuries its power reached even farther north almost to the modern Aswan... Now archaeologists confirmed the presence of previously known sites, but also discovered...