The art of architecture is later in its beginning than that of poetry, for it can exist only when men have learned to build solidly and permanently. A nomad may be a poet, but he cannot be an architect; a herdsman might have written the Book of Job, but the great builders are dwellers in cities. But since men first learned to build they have never quite forgotten how to do so. At all times there have been somewhere peoples who knew enough of building to mold its utility into forms of beauty, and the history of architecture may be read more continuously than that of any other art. It is a history of constant change and of continuous development, each people and each age forming out of the old elements a new style which should express its mind, and each style reaching its point of greatest distinctiveness only to begin a further transformation into something else; but is it a history of progress? Building, indeed, has progressed at one time or another. The Romans, with their domes and arches, were more scientific builders than the Greeks, with their simple post and lintel, but were they better architects? We of to-day, with our steel construction, can scrape the sky with erections that would have amazed the boldest of medieval craftsmen; can we equal his art? If we ask where in the history of architecture do its masterpieces appear, the answer must be “Almost anywhere.” Wherever men have had the wealth and the energy to build greatly, they have builded beautifully, and the distinctions are less between style and style or epoch and epoch than between building and building. The masterpieces of one time are as the masterpieces of another, and no man may say that the nave of Amiens is finer than the Parthenon or that the Parthenon is nobler than the nave of Amiens. One may say only that each is perfect in its kind, a supreme expression of the human spirit.