As these ancient mosaic figures of the Virgin, enthroned with her infant Son, were the precursors and models of all that was afterwards conceived and executed in art, we must examine them in detail before proceeding further. The mosaic of the cathedral of Capua represents in the highest place the half figure of Christ in the act of benediction. In one of the spandrels, to the right, is the prophet Isaiah, bearing a scroll, on which is inscribed, _Ecce Dominus in fortitudine veniet, et brachium ejus dominibatur_,--"The Lord God will come with strong hand, and his arm shall rule for him." (Isaiah, ch. xl. v. 10.) On the left stands Jeremiah, also with a scroll and the words, _Fortissime, magne, et patens Dominus exercituum nomen tibi_,--"The great, the mighty God, the Lord of hosts is his name." (Jeremiah, ch. xxxii. v. 18.) In the centre of the vault beneath, the Virgin is seated on a rich throne, a footstool under her feet; she wears a crown over her veil. Christ, seated on her knee, and clothed, holds a cross in his left hand; the right is raised is benediction. On one side of the throne stand St. Peter and St. Stephen; on the other St. Paul and St. Agatha, to whom the church is dedicated. The Greek monogram of the Virgin is inscribed below the throne. The next in date which remains visible, is the group in the apsis of S. Maria-della-Navicella (Rome), executed about 820, in the time of Paschal I, a pontiff who was very remarkable for the zeal with which he rebuilt and adorned the then half-ruined churches of Rome. The Virgin, of colossal size, is seated on a throne; her robe and veil are blue; the infant Christ, in a gold-coloured vest, is seated in her lap, and raises his hand to bless the worshippers. On each side of the Virgin is a group of adoring angels; at her feet kneels the diminutive figure of Pope Paschal. In the Santa Maria-Nova (called also, "Santa Francesca," Rome), the Virgin is seated on a throne wearing a rich crown, as queen of heaven. The infant Christ stands upon her knee; she has one hand on her bosom and sustains him with the other. On the façade of the portico of the S. Maria-in-Trastevere at Rome, the Virgin is enthroned, and crowned, and giving her breast to the Child. This mosaic is of later date than that in the apsis, but is one of the oldest examples of a representation which was evidently directed against the heretical doubts of the Nestorians: "How," said they, pleading before the council of Ephesus, "can we call him God who is only two or three months old; or suppose the Logos to have been _suckled_ and to increase in wisdom?" The Virgin in the act of suckling her Child, is a _motif_ often since repeated when the original significance was forgotten.