"The account given by the Liturgy of the life of this holy Doctor is so complete that we need add nothing further. But it will be well to give a short summary of the definitions by which in the eighth and sixteenth centuries the Church has avenged the holy Images from the attacks made on them by hell. The second Council of Nicaea declares that: 'It is lawful to place in churches, in frescoes, in pictures, on vestments and the sacred vessels, on the walls of houses and in public streets, images, whether painted or mosaic or of other suitable material, representing Our Lord and Saviour Jesus Christ, our most pure Lady, the holy Mother of God, the angels and the saints; and it is equally lawful to burn incense before them and surround them with lights' [Second Council of Nicaea, Session VII.]. 'Not that we must believe that these images have any divinity or virtue of their own,' says the Council of Trent against the Protestants, 'or that we must put our confidence in them as the pagans did in their idols. But the honour which given to the images is referred to Christ the prototype, to whom through them all our veneration is addressed, and to the saints whom we venerate in their portraits' [Council of Trent, Session XXV.]."
Of course, Nicea and Trent were excellent dog and pony shows for those wishing to sidestep the second commandment (the real one, not the catholic version).
Neither of them were for true Bible believers.