The list of the seven kings of Rome, or eight if we include Titus Tatius, is as follows: Romulus, Numa Pompilius, Tullus Hostilius, Ancus Marcius, Tarquinius Priscus, Servius Tullius, Tarquinius Superbus. No historian doubts the existence of the last three kings, since there is clear evidence of their reigns in Rome.