Let us take as an example the Middle Ages, where we see more clearly because it is nearer to us. During its first period, while theocracy is organizing Europe, while the Vatican is rallying and reclassing about itself the elements of a Rome made from the Rome which lies in ruins around the Capitol, while Christianity is seeking all the stages of society amid the rubbish of anterior civilization, and rebuilding with its ruins a new hierarchic universe, the keystone to whose vault is the priest — one first hears a dull echo from that chaos, and then, little by little, one sees, arising from beneath the breath of Christianity, from beneath the hand of the barbarians, from the fragments of the dead Greek and Roman architectures, that mysterious Romanesque architecture, sister of the theocratic masonry of Egypt and of India, inalterable emblem of pure