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.
Titus
His satisfactory record may also have been due to the fact that he survived his accession but a very short time, for he was thus given no opportunity for wrongdoing. For he lived after this only two years, two months and twenty days—in addition to the thirty-nine years, five months and twenty-five days he had already lived at that time. In this respect, indeed, he is regarded as having equalled the long reign of Augustus, since it is maintained that Augustus would never have been loved had he lived a shorter time, nor Titus had he lived longer. For Augustus, though at the outset he showed himself rather harsh because of the wars and the factional strife, was later able, in the course of time, to achieve a brilliant reputation for his kindly deeds; Titus, on the other hand, ruled with mildness and died at the height of his glory, whereas, if he had lived a long time, it might have been shown that he owes his present fame more to good fortune than to merit.