You have quarries of marble richer than Pantelicus, more varied than Paros, but do not build a great white square house of marble and think that it is beautiful, or that you are using marble nobly.  If you build in marble you must either carve it into joyous decoration, like the lives of dancing children that adorn the marble castles of the Loire, or fill it with beautiful sculpture, frieze and pediment, as the Greeks did, or inlay it with other coloured marbles as they did in Venice.  Otherwise you had better build in simple red brick as your Puritan fathers, with no pretence and with some beauty.  Do not treat your marble as if it was ordinary stone and build a house of mere blocks of it.  For it is indeed a precious stone, this marble of yours, and only workmen of nobility of invention and delicacy of hand should be allowed to touch it at all, carving it into noble statues or into beautiful decoration, or inlaying it with other coloured marbles:  for the true colours of architecture are those of natural stone, and I would fain see them taken advantage of to the full.  Every variety is here, from pale yellow to purple passing through orange, red and brown, entirely at your command; nearly every kind of green and grey also is attainable, and with these and with pure white what harmony might you not achieve.  Of stained and variegated stone the quantity is unlimited, the kinds innumerable.  Were brighter colours required, let glass, and gold protected by glass, be used in mosaic, a kind of work as durable as the solid stone and incapable of losing its lustre by time.  And let the painter’s work be reserved for the shadowed loggia and inner chamber.

This is the true and faithful way of building.  Where this cannot be, the device of external colouring may indeed be employed without dishonour—­but it must be with the warning reflection that a time will come when such aids will pass away and when the building will be judged in its lifelessness, dying the death of the dolphin.  Better the less bright, more enduring fabric.  The transparent alabasters of San Miniato and the mosaics of Saint Mark’s are more warmly filled and more brightly touched by every return of morning and evening rays, while the hues of the Gothic cathedrals have died like the iris out of the cloud, and the temples, whose azure and purple once flamed above the Grecian promontory, stand in their faded whiteness like snows which the sunset has left cold.

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I do not know anything so perfectly commonplace in design as most modern jewellery.  How easy for you to change that and to produce goldsmiths’ work that would be a joy to all of us.  The gold is ready for you in unexhausted treasure, stored up in the mountain hollow or strewn on the river sand, and was not given to you merely for barren speculation.  There should be some better record of it left in your history than the merchant’s panic and the ruined home.  We do not remember often enough