(_γγ_) The frieze, moreover, which rests on the entablature, carries the _wreath_ or _cornice._ The function of this is to support the roof, which completes the whole upwards. Here we at once meet with questions of what form this final limitation is to be. For we may have in this respect two kinds of termination, either the horizontal and rectangular, or the one inclined to an acute or obtuse angle. If we look at the mere question of natural necessity we shall see that Southerners, who suffer little from rain and storm, merely require protection from sunlight; in their case a horizontal and rectangular roofing of house is likely to suffice. Northerners, on the contrary, have to protect themselves against inevitable showers of rain, against contingency of snow, that the weight may not prove too great; they require inclining roofs. At the same time, in the case of a fine art of building, mere necessity is not only of account; as art it has also to satisfy the profounder requirements of what is pleasing and beautiful. What mounts upwards from the ground must be conceived with a base, a foot, on which it stands and which serves it for _support_; and in addition to this columns and the partitions of genuine architecture supply us visibly with the _means of support._ That which closes all above, the roofing, has no longer to support a weight, but merely to be supported, and is bound to declare in itself this definite aspect that it no longer supports anything. In other words, it must be so constructed that it is actually unable to support, and consequently fine down to an angle, whether it be acute or obtuse. Ancient temples have in consequence no horizontal roofing, but two roof surfaces which meet at obtuse angles, and it is out of consideration for beauty that the building is thus terminated. In short, roof surfaces that are horizontal do not give us the appearance of a building entirely complete; a horizontal flat may always add further weight to its height; this the line in which inclining roof surfaces terminate is no longer able to do. To take an analogous case in the art of painting, it is the pyramidal form in the grouping of figures which best satisfies artistic taste. (_γ_) The final determining factor which we have to consider is that of the _enclosing_, the _walls_, and _partitions._ Columns no doubt support and form a boundary, but they do not enclose; they are, on the contrary, as such boundary, incompatible with the interior which is hemmed in by walls. If we require such an absolute enclosure we must have also thick and solid dividing walls erected. This is actually the case in temple construction.