The west front has a curious Romanesque doorway, and there is a massiveness of wall and buttress which the rather diminutive proportions of the general plan of the church make notably apparent. Otherwise the effect, from a not too near view-point, is one of a solidity and firmness of building only to be seen in some of the neighbouring fortress-churches. A tower of rather heavy proportions is to-day capped with a pyramidal slate or timbered apex after the manner of the western towers at Rodez. From a distance, this feature has the suggestion of the development of what may perhaps be a local type of _clocher_. Closer inspections, when its temporary nature is made plain, disabuses this idea entirely. It is inside the walls that the great charm of this church lies. It is elaborately planned, profuse in ornament,--without being in any degree redundant,--and has a warmth and brilliancy which in most Romanesque interiors is wanting. This interior is representative, on a small scale, of that class of structure whose distinctive feature is what the French architect calls a _nef unique_, meaning, in this instance, one of those great single-chambered churches without aisles, such as are found at Perpignan, new Carcassonne, Lodève, and in a still more amplified form at Albi. There are of course no aisles; and for a length of something over two hundred feet, and a breadth of fifty-five, the bold vault--in the early pointed style--roofs one of the most attractive and pleasing church interiors it is possible to conceive. Of the artistic accessories it is impossible to be too enthusiastic. There are sixty-six choir-stalls, most elaborately carved in wood--perhaps mahogany--of a deep rich colouring seldom seen. Numerous other sculptured details in wood and stone set off with unusual effect the great and well-nigh windowless side walls. The organ _buffet_ of Renaissance workmanship--as will naturally be inferred--is a remarkably elaborate work, much more to be admired than many of its contemporaries. Among the other decorative features are an elaborately conceived "tree of Jesse," an unusually massive rood-loft or _jube_, and a high-altar of much magnificence. The choir is surrounded by eleven chapels, showing in some instances the pure pointed style, and in the latter ones that of the Renaissance. A fourteenth-century funeral monument of Bishop Hugh de Castillione is an elaborate work in white marble; while a series of paintings on the choir walls,--illustrating the miracles of St. Bertrand,--though of a certain crudity, tend to heighten the interest without giving that effect of the over-elaboration of irrelative details not unfrequently seen in some larger churches.