Since Bonaventure never wrote a treatise dedicated to the Eucharist, his extensive treatment in the fourth book of his commentary on Peter Lombard's Sentences, which covers many of the topics that would have comprised such a work, stands as his most extensive discussion. In it the Seraphic Doctor considers, among other things, the symbolism of the Eucharist, its connection to the imagery of the Old Testament, the metaphysics of transubstantiation,...