(D (w)) The Horus name of the fifth King of the first Egyptian dynasty, called Septy in the actual list of Abydos and Usaphaidos by Manetho, who ascribed a reign of 20 years, although it had to be of longer duration (between 50 and 55). He was son and successor of Uadji (also known as Djet), known as the "Snake King" for his famous Stela of the Louvre Museum, King who had it probably of Meryt-Neith. A series of slats found in Abydos and Saqqara, as well as the information provided by the Palermo stone, allow to know some events of his reign, focused primarily on a census, military campaigns, ceremonies and religious activities. Among the first victories against the Asians, the Bedouins of Sinai (splint of ivory in the British Museum) and the tesemtyu should be printed. Among the latter, the celebration of two parties Sed, the construction of a temple, the commemoration of the birth of different gods and goddesses and the cult in honor of Atum and Apis. Personally, Den became interested in medicine, as it was later reflected in the Papyrus Ebers instructions. Like other Kings of his dynasty, Den also featured two tombs. One in Abydos, surrounded by 174 tombs satellites, with architectural innovations based on the use of the granite pavement, and which provided impressions of seals and tablets of ivory and ebony with its name (that would be restored during the 26TH dynasty Tomb), and one at Saqqara, a large mastaba attributed by some to his Chancellor of lower Egypt and influential character, Hemaka. The King Den was succeeded on the throne by Adjib, still minor.