The influence of materials on architecture is also worth notice. Where granite, which is worked with difficulty, is the material obtainable, architecture has invariably been severe and simple; where soft stone is obtainable, exuberance of ornament makes its appearance, in consequence of the material lending itself readily to the carver's chisel. Where, on the other hand, marble is abundant and good, refinement is to be met with, for no other building material exists in which very delicate mouldings or very slight or slender projections may be employed with the certainty that they will be effective. Where stone is scarce, brick buildings, with many arches, roughly constructed cornices and pilasters, and other peculiarities both of structure and ornamentation, make their appearance, as, for example, in Lombardy and North Germany. Where materials of many colours abound, as is the case, for example, in the volcanic districts of France, polychromy is sought as a means of ornamentation. Lastly, where timber is available, and stone and brick are both scarce, the result is an architecture of which both the forms and the ornamentation are entirely dissimilar to those proper to buildings of stone, marble, or brick, as may be seen by a glance at our illustration of an early Scandinavian church built of timber (Fig. 6), which presents forms appropriate to a timber building as being easily constructed of wood, but which would hardly be suitable to any other material whatever. [Illustration: FIG. 7.--EGYPTIAN CORNICE.] CHAPTER II. EGYPTIAN ARCHITECTURE.