The greatest architectural expression of a people has ever been in its Christian monuments, but references to the cathedrals, churches and chapels of the Pyrenean states have for the most part been regretfully omitted from these pages, giving place to fortresses, châteaux, great bridges, towers, donjons, and such public monuments as have a special purport in keeping with the preconceived limits of a volume which deals largely with the romance of feudal times. Generally speaking, the architectural monuments of these parts are little known by the mass of travellers, except perhaps Henri Quatre's ancestral château at Pau, the famous walls of Carcassonne, and perhaps Bayonne's bridges or the Eglise St. Saturnin and the bizarre cathedral of St. Etienne at Toulouse. All of these are excellent of their kind; indeed perhaps they are superlative in their class; but when one mentions Perpignan's Castillet, the Château de Puylaurens, the arcaded Gothic houses of Agde, Béziers' fortress-cathedral, the fortress-church of St. Bertrand de Comminges or a score of other tributary monumental relics, something hitherto unthought of is generally disclosed. Almost the whole range of architectural display is seen here between the Mediterranean and the Gulf of Gascony, and any rambling itinerary laid out between the two seas will discover as many structural and decorative novelties as will be found in any similar length of roadway in France. [Illustration: _Watch-tower in the Val d'Andorre_] Leaving the purely ecclesiastical edifices--cathedrals and great churches--out of the question, the entire Midi of France, and the French slopes and valleys of the Pyrenees in particular, abounds in architectural curiosities which are marvels to the student and lover of art. There are _châteaux_, _chastels_ and _chastillons_, one differing from another by subtle distinctions which only the expert can note. Then there are such feudal accessories as watch-towers, donjons and _clochers_, and great fortifying walls and gates and barbicans, and even entire fortified towns like Carcassonne and La Bastide. Surely the feudality, or rather its relics, cannot be better studied than here,--"where the people held the longest aloof from the Crown." The watch-towers which flank many of the valleys of the Pyrenees are a great curiosity and quandary to archæologists and historians. Formerly they flashed the news of wars or invasions from one outpost to another, much as does wireless telegraphy of to-day. Of these watch-towers, or _tours télégraphiques_, as the modern French historians call them, that of Castel-Biel, near Luchon, is the most famous. It rises on the peak of a tiny mountain in the valley of the Pique and is a square structure of perhaps a dozen or fifteen feet on each side. Sixteen feet or so from the ground, on the northwest façade, is an opening leading to the first floor. This tower is typical of its class, and is the most accessible to the hurried traveller.