The first volume, for instance, contains five books treating successively of the Cross on which Jesus Christ died, of images of the cross, of apparitions of the Holy Cross, of the sign of the cross, and of the spiritual cross.
The first volume provides an in-depth examination of different types of crosses, including the one associated with Jesus Christ's crucifixion, visual representations of the cross, spiritual manifestations of the Holy Cross, the symbolic meaning of the sign of the cross, and the allegorical significance of the spiritual cross.