No one who visits both Rome and Athens at the present day can fail to be struck by one remarkable difference between the two famous cities, which stand for so much in the history of the world. While Athens is composed of a very old group of ruins and a brand-new town, which was rapidly made to order in Germany; while every trace of that mediæval splendour, which once distinguished the court of the Frank dukes, has vanished; in Rome, on the other hand, we have side by side the works of the kings, the memorials of the Republic, the monuments of the Empire, the remains of the Middle Ages, and the modern erections that have sprung up since 1870…