SECTION XX. This Greek architecture, then, with its two orders, was clumsily copied and varied by the Romans with no particular result, until they begun to bring the arch into extensive practical service; except only that the Doric capital was spoiled in endeavors to mend it, and the Corinthian much varied and enriched with fanciful, and often very beautiful imagery. And in this state of things came Christianity: seized upon the arch as her own; decorated it, and delighted in it; invented a new Doric capital to replace the spoiled Roman one: and all over the Roman empire set to work, with such materials as were nearest at hand, to express and adorn herself as best she could. This Roman Christian architecture is the exact expression of the Christianity of the time, very fervid and beautiful--but very imperfect; in many respects ignorant, and yet radiant with a strong, childlike light of imagination, which flames up under Constantine, illumines all the shores of the Bosphorus and the Aegean and the Adriatic Sea, and then gradually, as the people give themselves up to idolatry, becomes Corpse-light. The architecture sinks into a settled form--a strange, gilded, and embalmed repose: it, with the religion it expressed; and so would have remained for ever,--so _does_ remain, where its languor has been undisturbed. [Footnote: The reader will find the _weak_ points of Byzantine architecture shrewdly seized, and exquisitely sketched, in the opening chapter of the most delightful book of travels I ever opened,-- Curzon's "Monasteries of the Levant."] But rough wakening was ordained.