The opprobrious term was fixed by the Encyclopædists of the next century, when prejudice against the Middle Ages became militant and organized. With exclusive pedantism they dismissed the most national and civilized of arts as worthy of those rough invaders, the Goths. Voltaire, who, says Guizot, garnered only what was mean and criminal in the Middle Ages, saw in the study of Gothic architecture "a coarse curiosity, lacking good taste." As late as 1800, a project was abroad to disencumber the soil of France of "these overcharged façades with their multitude of indecent and ridiculous figures." And still later, the students in the national school of architecture were taught to despise the most reasoned, the most robust, the most logical of arts as a style of confusion and caprice. The rehabilitation of Gothic architecture in France, if tardy, has been ample. No branch of modern science presents a more able corps of workers. While true to the Latin genius, which unites clarity of style with an exact erudition, they have obeyed a yet deeper race instinct which knows that matter must be vivified by spirit, else learning sinks to a dry-as-dust recording, incapable of its highest flight. The telling of the monumental story of France has been touched by the sacred flame of patriotism. Like paladins, these modern knights are abroad on all the by-paths eager to rescue some hidden treasure of the national art. Future scholarship will look back at the brilliant achievements of the French archæologists of to-day with the same pride that is felt for the Benedictine savants of the XVII century. The aim of archæology is to date a monument correctly. How to do this by scientific method has been taught the last two generations at the École des Chartes, the national school par excellence, so M. de Vögué called it. Archives are pored over to trace each link with history, and those monuments which have no authenticated pedigree are compared with those of certain date. Each manuscript date is verified by the analysis of the edifice itself, whose successive campaigns of building are deciphered, since few and far between are the homogeneous churches. Each restoration also is verified. One of the solid bases for archæological exactness is the knowledge of profiles, which are called by the English textbook rib molds, arch molds, pier molds, or base molds. By a comparative analysis of profiles, a monument can now be accurately dated. As keystones were of different types in the various earlier decades of Gothic, they too help to substantiate an edifice.[14]