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.
History of Italy
The traditional account of Roman history, which has come down to us through Livy, Plutarch, Dionysius of Halicarnassus, and others, is that in Rome's first centuries it was ruled by a succession of seven kings. The traditional chronology, as codified by Varro, allots 243 years for their reigns, an average of almost 35 years, which, since the work of Barthold Georg Niebuhr, has been generally discounted by modern scholarship. The Gauls destroyed much of Rome's historical records when they sacked the city after the Battle of the Allia in 390 BCE (Varronian, according to Polybius the battle occurred in 387/6) and what was left was eventually lost to time or theft. With no contemporary records of the kingdom existing, all accounts of the kings must be carefully questioned.