"Now behind this altar we find the apse, assuming in most cathedrals the form of a semicircle. There are exceptions; to mention three: at Poitiers, at Laon, and in Notre Dame du Fort at Étampes the wall is square, as in the ancient civic basilicas, and does not describe the sort of half-moon, of which the significance is one of the most beautiful inventions of symbolism.
"This semicircular end, this apsidal shell, with the chapels that surround the choir, simulates the Crown of Thorns on the Head of Christ. Excepting in Sanctuaries which are wholly dedicated to Our Lady--this one, Notre Dame de Paris, and some others--one of these chapels, that in the centre and the largest, is dedicated to the Virgin, to show by the place that it occupies at the end of the church that Mary is the last refuge of sinners.
"She, in person, is again symbolized by the Sacristy, whence the priest comes forth as Christ's representative after putting on his sacerdotal vestments, as Jesus came forth from His Mother's womb after clothing Himself in flesh.
"It must constantly be repeated; every part of a church and every material object used in divine worship is representative of some theological truth. In the script of architecture everything is a reminiscence, an echo, a reflection, and every part is connected to form a whole.
"For instance, the altar, which is the Image of Our Lord, must be draped with white linen in memory of the winding-sheet in which Joseph of Arimathea wrapped His body--and that linen must be woven of pure thread, of hemp or flax. The chalice, which according to the texts adduced by the _Spicilegium_ of Solesmes, is to be taken now as a symbol of glory, and now as a sign of opprobrium, may be regarded, by the most generally received theory, as the figure of the sacred Tomb; then the paten appears as the stone which served to close it, while the corporal is the shroud itself.
"When I tell you further," added the Abbé, "that according to Saint Nilus, the columns signify the divine dogmas, or, according to Durand of Mende, the Bishops and the Doctors of the Church, that the capitals are the words of Scripture, that the pavement of the church is the foundation of faith and humility, that the ambos and rood-loft, almost everywhere destroyed, figure the pulpit of the gospel, the mountain on which Christ preached; again, that the seven lamps burning before the altar are the seven gifts of the Spirit, that the steps to the altar are the steps to perfection; that the alternating choirs represent on the one side the angels, and on the other the righteous, combining to do homage with their voices to the glory of the Most High, I have pretty well explained to you the general meaning and detailed symbolism of the interior of the cathedral, and more particularly that of Chartres.