Augustus
Augustus' reign laid the foundations of a regime that lasted, in one form or another, for nearly fifteen hundred years through the ultimate decline of the Western Roman Empire and until the Fall of Constantinople in 1453. Both his adoptive surname, Caesar, and his title "Augustus" became the permanent titles of the rulers of the Roman Empire for fourteen centuries after his death, in use both at Old Rome and at New Rome. In many languages, "Caesar" became the word for "Emperor", as in the German "Kaiser" and in the Bulgarian and subsequently Russian "Tsar" (sometimes Csar or Czar). The cult of "Divus Augustus" continued until the state religion of the Empire was changed to Christianity in 391 by Theodosius I. Consequently, there are many excellent statues and busts of the first emperor. He had composed an account of his achievements, the "Res Gestae Divi Augusti", to be inscribed in bronze in front of his mausoleum. Copies of the text were inscribed throughout the Empire upon his death. The inscriptions in Latin featured translations in Greek beside it, and were inscribed on many public edifices, such as the temple in Ankara dubbed the "Monumentum Ancyranum", called the "queen of inscriptions" by historian Theodor Mommsen.
Roman Kingdom
The traditional version of Roman history, which has come down to us principally through Livy (64 or 59 BC-AD 12 or 17), Plutarch (46–120), and Dionysius of Halicarnassus ( 60 BC – after 7 BC), recounts that a series of seven kings ruled the settlement in Rome's first centuries. The traditional chronology, as codified by Varro (116 BC – 27 BC), allows 243 years for their combined reigns, an average of almost 35 years. Since the work of Barthold Georg Niebuhr, modern scholarship has generally discounted this schema. The Gauls destroyed many of Rome's historical records when they sacked the city after the Battle of the Allia in 390 BC (according to Varro; according to Polybius, the battle occurred in 387/6), and what remained eventually fell prey to time or to theft. With no contemporary records of the kingdom surviving, all accounts of the Roman kings must be carefully questioned.