 This interpretation is based upon the angel's explanation of the beast in , that the beast's seven heads are seven kings () and that Nero, is the sixth king "who is", who was possibly alive and the emperor reigning at the time John was writing the book.The five kings who have fallen are seen as Julius, Augustus, Tiberius, Caligula and Claudius; Galba is the one who "has not yet come, but when he does come, he must remain for a little while".