The doctrine of God remains one of the most fundamental and significant areas of early Franciscan innovation. Since Augustine, medieval thinkers in the West had largely identified ‘simplicity’ as the most fundamental feature of the divine nature. Thus, the doctrine of divine simplicity, now frequently referred to as ‘classical theism’, had been propounded by such noteworthy figures as Hilary of Poitiers, Anselm of Canterbury, Peter Lombard, and Thomas Aquinas, who articulated this doctrine in its mature form.1 Against the otherwise relatively continuous Western tradition of thinking about the general nature of God, this chapter will demonstrate that the Summa Halensis developed a second and separate line of thought on the matter. This new tradition stressed God’s immensity or infinity where the preceding one had emphasized his basic simplicity. In doing so, I would argue, it instigated a fundamental shift in the way of conceiving the nature of God that correlated strongly to Francis’ own theological outlook.2