The C-Group culture is an archaeological culture found in Lower Nubia, which dates from c. 2400 BCE to c. 1550 BCE. It was named by George A. Reisner. With no central site and no written evidence about what these people called themselves, Reisner assigned the culture a letter. The C-Group arose after Reisner's A-Group and B-Group cultures, and around the time the Old Kingdom was ending in Ancient Egypt.