In this paper, I explore Kant's much-studied critique of the ontological argument, seeking to place Immanuel Kant and Anselm of Canterbury more directly in contact with one another; I do this in two ways. First, I discuss the historical reception of the ontological argument in Kant's eighteenth century context. Second, I move the discussion away from the first Critique, and look towards Kant's Pre-critical discussion of the ontological argument in The Only Possible Argument, where he initially sets out his primary objection. By shifting the focus towards these areas of Kant's thought, I aim to achieve three interrelated goals. First, I show that Kant had a limited knowledge of the history and origins of the ontological argument, which was transmitted to him through Leibniz, Wolff, and Baumgarten, who put a Cartesian spin on it. Second, I provide textual evidence which shows that Kant's objection does not succeed against Anselm's argument. Third, I elucidate that Kant's identification of God as the ens realissimum is compatible with Anselm's identification of God as ‘something than which nothing greater can be thought’.