Notre-Dame de Paris is, in particular, a curious specimen of this variety. Each face, each stone of the venerable monument, is a page not only of the history of the country, but of the history of science and art as well. Thus, in order to indicate here only the principal details, while the little Red Door almost attains to the limits of the Gothic delicacy of the fifteenth century, the pillars of the nave, by their size and weight, go back to the Carlovingian Abbey of Saint-Germain-des-Prés. One would suppose that six centuries separated these pillars from that door. There is no one, not even the hermetics, who does not find in the symbols of the grand portal a satisfactory compendium of their science, of which the Church of Saint-Jacques de la Boucherie was so complete a hieroglyph. Thus,
