The Protodynastic Period of Egypt (generally dated 3200 BCE to 3000 BCE) refers to the period of time at the very end of the Predynastic Period. It is equivalent to the archaeological phase known as Naqada III. It is sometimes known as Late Predynastic Period or Dynasty 0. Most Egyptologists consider Narmer to be the last king of this period (although some place him in the First Dynasty), as well as the so-called "Scorpion King(s)", whose name may refer to, or be derived from, the goddess, Serket, a special early protector of other deities and the rulers.