This disposition is extremely interesting, as it at once raises the question of the resemblance between ecclesiastical and domestic architecture, and takes us immediately to the root of the matter, namely, that architecture is essentially a noble form of construction, embellished suitably to its purpose. It follows, therefore, that church and house architecture are only likely to differ in so far as their purposes differ. Here at Oakham was a space to be covered of much the same area as a church, and it was covered in the same way. The means at the disposal of the builders forbade very wide spans, therefore they divided the width of the building by two walls carried on a series of arches. The middle space (or nave) was of no greater width than could be covered by a timber roof resting on the arcaded walls. The two outer spaces (or aisles) were covered by narrower roofs leaning against the walls of the nave. This simple solution of a constructional problem was applied equally to churches or houses, but it so happens that there were many churches of a width demanding such a treatment and but few houses. The churches have survived, while the houses have mostly disappeared; and consequently the disposition which is in reality constructional, has become associated with church architecture. So too with various features, such as doors and windows. These were treated, broadly speaking, in the same way whether in churches or houses, but in the former they were, as a rule, more elaborately embellished. Their general forms were the same; that is to say, when arches were round in churches they were round in houses; when pointed in the one they were pointed in the other. When mullions, tracery, and cusping became the fashion in churches, they became also, though in less degree, the fashion in houses. This, however, is to be observed that, as a rule, more elaboration and more fancy were bestowed upon ecclesiastical work than upon domestic. So far as windows are concerned the practical necessity of having some means of opening and closing those in houses led to the dividing of them into manageable sizes by means of horizontal cross-bars or transomes, which are much more frequent in houses than in churches. This similarity of treatment between the two classes of buildings, although only what might be expected on reflection, has led to much confusion in the popular mind, and has resulted in many an old hall being looked upon as a chapel.