The original Roman city was rectangular in form and of considerable dimensions. It is supposed to have been laid out in imitation of ancient Rome, on the east bank of the Ouse. A temple to Bellona was erected as well as a prætorium, in which the emperors sat, for Eboracum was honoured by the great heads of Rome. The first to reside here was Hadrian, in 120, whilst Severus died in the city in 211. This last had come over with his sons, Caracalla and Geta, and a large army, and the attendance of his whole court. His time was busily engaged in reducing the troublesome Britons to proper submission. The two sons nobly helped their aged father. Caracalla completed the erection of a strong wall of stone nearly eighty miles long, close to the rampart of earth raised by Hadrian, in accordance with the wish of Severus, to form a more effectual barrier against future incursions of the natives. During the residence of the court, Eboracum reached to the highest state of splendour. The constant visits of tributary kings and foreign ambassadors, who came to pay their allegiance to Rome, caused it to be unsurpassed among the cities of the world, so much so that it came to be called "Altera Rome." The remains of the Emperor Severus, though he died here in 212, were enclosed in an urn and sent to Rome. The Emperor Constantius Chlorus died also in Eboracum in 307. His son, Constantius the Great, was present at his father's death, and by the army proclaimed emperor. After 409 the Greek and Latin writers tell us that Britain was no longer ruled by the Romans. Their statements are borne out by the Saxon Chronicle. This did not mean that there was a general exodus of the Latin race or civilisation, for the connection of Rome with its British provinces did not cease suddenly, though the tie gradually became weakened, because from 409 Roman officials probably ceased to be sent regularly. Britain still considered itself to be Roman, and the inhabitants, or rather the upper classes, continued to speak Latin. Even in the sixth century they were pleased to call themselves "Romani," and held themselves aloof from the surrounding barbarians--a term which we know was applied by the Romans to tribes, not necessarily because they were uncivilised, but rather as a convenient mark of distinction from themselves. Since their departure from Britain, archæologists have found rich mines of Roman remains in every place of their occupation, and none more so than at York; but to enumerate the many discoveries would require more space than can here be allotted. Suffice it to say that the "multangular tower" is a notable evidence of the Roman occupation, though it is much dilapidated.