Technically speaking, these paintings are not frescoes. "The medium employed seems to have been egg, the white and yolk mixed, and the method very analogous to that of water-colour painting.... The red tones were laid over a bed of deep orange, the effect being one of extraordinary vigour and brilliance, taking into account the means at command. The use of a prepared ground was systematic, and was resorted to whenever intensity of the tones or colour effects was desired. Evident efforts in the direction of modelling are noticeable, though these have been neutralised to a great extent by a lack of concentration in the lights, and if it were not for the thick outline in which each figure is set, there would be much in common between the methods of these paintings and those renderings of diffused light affected by our modern _plein-airistes_. The general tone is that of the simpler paintings of the thirteenth century, that is to say, of those in which no gold was used. The effect is warm and brilliant, the dominant hue orange, heightened by reds of various tints."[39] [39] From the technical notes of M. Gaïda. According to the archæological records derived from various works of the historians of Le Quercy, these paintings in the west cupola of Cahors were carried out under the direction of the Bishops Raymond de Cornil, 1280-93, Sicard de Montaigu, 1294-1300, Raymond Panchelli,[40] 1300-1312, or Hugo Geraldi, 1312-16, the friend of Pope Clement V. and of Philip IV. of France, who was burnt alive at Avignon, or perhaps even of Guillaume de Labroa, 1316-24, whose residence was at Avignon, and who governed the diocese of Cahors through a procurator. From this period onwards there was no further question of decorative works, the successors of these bishops being fully occupied in maintaining the struggle against the English invaders. [40] Raymond Panchelli, or Raymond II., who in 1303 began to build the Bridge of Valentré at Cahors. It seems reasonable therefore to infer that the Cahors paintings date either from the end of the thirteenth century or the beginning of the fourteenth. In any case, these decorations are of very great artistic merit, and of the highest interest as an unique example of French decorative art at the finest period of the thirteenth century, when Gothic architecture had reached its apogee, and was producing masterpieces which served as models for contemporary artists, and even more notably, for those of the early fourteenth century. That vigilant guardian of our beautiful cathedrals and historic monuments, the _Administration des Cultes_, has taken measures which do it infinite honour in this matter. No attempt has been made to restore the paintings, but all necessary steps have been taken to ensure their preservation as they stand, so as to leave intact the archæological value of these convincing witnesses to the genius of our French mediæval painters.