Some symbols were of pagan origin, for the palm of victory and the olive branch of peace were borrowed from the Romans, who had themselves inherited them from older civilizations. Their significance was not changed but simply limited and sanctified; the victory, for Christians, was the victory over sin, and the peace, the peace of God. These various methods of determining the value of different plants as symbols did not always accord. M. Huysman, in _La Cathédrale_, a very complete study in Christian symbolism, instances the sycamore: ‘Saint Melitus proclaims that the sycamore stands for cupidity.... Raban Maur and _L’anonyme de Clairvaux_ qualify it as the unbelieving Jew; Petrus of Capua compares it to the Cross, Saint Eucher to wisdom.’ Even the sifting of the text of Scripture did not always lead to identical conclusions. ‘I am the rose of Sharon’ (or ‘the flower of the field’) ‘and the lily of the valleys,’ sings the lover of the Canticles, who prefigures, according to Origen, Jesus Christ. But Saint Bernard of Clairvaux found that the words veiled the personality of the Virgin Mary, and other writers consider that they refer to the Church of God upon earth. There were, in fact, two schools of symbolists though they did not differ greatly. There were those who wrote before the eleventh century and whose influence is traced in the mosaics of Rome, Ravenna and the Baptistery of Florence, and those later ones whose authority was accepted by the painters of the Italian Renaissance and through them spread throughout the Christian world. Durandus, standing midway between the two schools of symbolism, held chiefly to the more ancient, though he also recognized the newer, usage. But after the twelfth century the painters of Siena alone kept to the ancient meaning of the symbols; Florence and the later schools broke away entirely. As far as flower-symbols were concerned the chief difference was in the use of the lily, which from being the flower indicative of heavenly bliss became the especial flower of the Virgin, typifying her purity. Also the rose, the flower of martyrdom, became the symbol of divine love, and the palm tree and the acanthus dropped out of devotional representations altogether. In the main, after the twelfth century, symbolists were agreed. There were certain fruits and flowers about which there never had been any doubt. The vine had been the emblem of Jesus Christ from the beginning of Christian theology. The white lily, as a symbol of chastity, came perhaps from the Hebrews, but all Christian writers were agreed as to its fitness as a symbol of purity and as an emblem or attribute of the Virgin Mary. The violet was the symbol of humility, and therefore, say Petrus of Capua and Saint Mectilda, the emblem of Christ when on earth. Saint Mectilda and Bishop Durandus, for the same reason, consider it the emblem of confessors.