In the year 64 the capital of the Roman Empire was, it is true, a large and splendid city and an "epitome of the world," but it had not yet reached either its zenith of splendour or its maximum, of size. Many of the largest and most sumptuous structures of which we possess the records, and in most cases the ruins, were not yet built or even contemplated. There was no Colosseum; there were no Baths of Trajan, Caracalla, or Diocletian. The Column of Trajan, still soaring in the Foro Traiano, and of Marcus Aurelius, now so conspicuous in the Piazza Colonna, are of a later date.