The longest-lived empire in the history of mankind was Ancient Egypt. This empire lasted for three thousand years - longer than any other. Already around 3100 BC there was two major kingdoms - Lower Egypt (Nile Delta region) and Upper Egypt (the Nile Valley from the Delta to Elephantine). After combining them (about 2640 BC) formed the so-called Old Kingdom. The history of Egypt is divided into two periods. The first - with the base and up to 332 BC, when Alexander the Great conquered the country. And the second period - the reign of the Ptolemaic dynasty (descendants of one of the generals of Alexander the Great). In 30 BC, Egypt was conquered by a young and powerful empire - Roman.