This severity must be singular, therefore, in the case of that art, above all others, whose productions are the most vast and the most common; which requires for its practice the co-operation of bodies of men, and for its perfection the perseverance of successive generations.  And, taking into account also what we have before so often observed of Architecture, her continual influence over the emotions of daily life, and her realism, as opposed to the two sister arts which are in comparison but the picturing of stories and of dreams, we might beforehand expect that we should find her healthy state and action dependent on far more severe laws than theirs:  that the license which they extend to the workings of individual mind would be withdrawn by her; and that, in assertion of the relations which she holds with all that is universally important to man, she would set forth, by her own majestic subjection, some likeness of that on which man’s social happiness and power depend.  We might, therefore, without the light of experience, conclude, that Architecture never could flourish except when it was subjected to a national law as strict and as minutely authoritative as the laws which regulate religion, policy, and social relations; nay, even more authoritative than these, because both capable of more enforcement, as over more passive matter; and needing more enforcement, as the purest type not of one law nor of another, but of the common authority of all.  But in this matter experience speaks more loudly than reason.  If there be any one condition which, in watching the progress of architecture, we see distinct and general; if, amidst the counter-evidence of success attending opposite accidents of character and circumstance, any one conclusion may be constantly and indisputably drawn, it is this; that the architecture of a nation is great only when it is as universal and as established as its language; and when provincial differences of style are nothing more than so many dialects.  Other necessities are matters of doubt:  nations have been alike successful in their architecture in times of poverty and of wealth; in times of war and of peace; in times of barbarism and of refinement; under governments the most liberal or the most arbitrary; but this one condition has been constant, this one requirement clear in all places and at all times, that the work shall be that of a school, that no individual caprice shall dispense with, or materially vary, accepted types and customary decorations; and that from the cottage to the palace, and from the chapel to the basilica, and from the garden fence to the fortress wall, every member and feature of the architecture of the nation shall be as commonly current, as frankly accepted, as its language or its coin.