In the monastery was dispensed not only medical aid, so far as the rudeness and ignorance of the superstitious practitioner allowed, but also unstinted and gratuitous hospitality. The conventual establishment was at once the hospital and the hotel of mediæval society. In the thinly peopled districts usually selected by its founders, no public provision was made for the relief of the sufferings of the invalid or the necessities of the traveller, and both found within its walls a generous and cordial greeting. Its sanctuary covered the trembling victim of feudal oppression with the mantle of its comfort and protection. Its towers, secure in their sacred character, passed unscathed through the wreck of dynasties and the perils of revolutionary violence. The substantial walls of donjon and barbican went down under the assaults of Norman, Saxon, Dane, and Lombard, but the abbey, defenceless save in the immunity afforded by the holy calling of its inmates, remained unchanged amidst these scenes of universal disorder and ruin, the depository of ancient learning, the refuge of the remnant of those elegant social courtesies which had survived the fall of imperial greatness, the asylum of the persecuted, the home of the arts, the preserver of civilization in a martial and unenlightened age. While Rome was the centre of ecclesiastical and temporal power, Constantinople was the undisputed seat of the refinement and culture of Christian Europe. The transfer of the government of the Empire to the confines of Asia had not, however, destroyed the prestige which the Eternal City had obtained by her glorious achievements in arts, in arms, in literature, in politics, during so many centuries. The new capital of the Cæsars could not properly be called a Roman city. Its population, after the first fifty years following its foundation, was more Greek than Latin, but its most distinctive features were always Asiatic. The ordinary idiom of its citizens was that of Ionia and Attica. The despotism of its court, the manners of its people, bore the pronounced stamp of the Orient. Its society was cosmopolitan, and the relations it maintained through the channels of trade with remote countries constantly filled its thoroughfares with picturesque and barbaric costumes. The brutality of the West, the vices of the East, the superstitions of Africa, the cruelty of Italy, found a congenial home on the shores of the Bosphorus. The successors of Constantine claimed and exercised prerogatives wholly inconsistent with the security of the community or the principles of equity. They interposed their authority to annul the sentences of judicial tribunals. They inflicted frightful tortures without the warrant of law or precedent. They imposed taxes which impoverished even the wealthiest of their subjects. They permitted their flatterers to extort ransoms, traffic in justice, and dispose of employments without even the decorous pretext of concealment.