[Illustration: Plate I. Wall-Veil-Decoration. CA'TREVISAN CA'DARIO.] § XVI. This passage is of peculiar interest, for two reasons. Observe, first, the impression of Commynes respecting the religion of Venice: of which, as I have above said, the forms still remained with some glimmering of life in them, and were the evidence of what the real life had been in former times. But observe, secondly, the impression instantly made on Commynes' mind by the distinction between the elder palaces and those built "within this last hundred years; which all have their fronts of white marble brought from Istria, a hundred miles away, and besides, many a large piece of porphyry and serpentine upon their fronts." On the opposite page I have given two of the ornaments of the palaces which so struck the French ambassador.[17] He was right in his notice of the distinction. There had indeed come a change over Venetian architecture in the fifteenth century; and a change of some importance to us moderns: we English owe to it our St. Paul's Cathedral, and Europe in general owes to it the utter degradation or destruction of her schools of architecture, never since revived. But that the reader may understand this, it is necessary that he should have some general idea of the connexion of the architecture of Venice with that of the rest of Europe, from its origin forwards. § XVII. All European architecture, bad and good, old and new, is derived from Greece through Rome, and colored and perfected from the East. The history of architecture is nothing but the tracing of the various modes and directions of this derivation. Understand this, once for all: if you hold fast this great connecting clue, you may string all the types of successive architectural invention upon it like so many beads. The Doric and the Corinthian orders are the roots, the one of all Romanesque, massy-capitaled buildings--Norman, Lombard, Byzantine, and what else you can name of the kind; and the Corinthian of all Gothic, Early English, French, German, and Tuscan. Now observe: those old Greeks gave the shaft; Rome gave the arch; the Arabs pointed and foliated the arch. The shaft and arch, the frame-work and strength of architecture, are from the race of Japheth: the spirituality and sanctity of it from Ismael, Abraham, and Shem. § XVIII. There is high probability that the Greek received his shaft system from Egypt; but I do not care to keep this earlier derivation in the mind of the reader. It is only necessary that he should be able to refer to a fixed point of origin, when the form of the shaft was first perfected. But it may be incidentally observed, that if the Greeks did indeed receive their Doric from Egypt, then the three families of the earth have each contributed their part to its noblest architecture: and Ham, the servant of the others, furnishes the sustaining or bearing member, the shaft; Japheth the arch; Shem the spiritualisation of both.