Providing a fresh evaluation of Alberti's text On Painting (1435), along with comparisons to various works of Nicholas Cusanus - particularly his Vision of God (1450) - this study reveals a shared epistemology of vision. And, the author argues, it is one that reflects a more deeply Christian Neoplatonic ideal than is typically accorded Alberti. Whether regarding his purpose in teaching the use of a geometric single point perspective system, or more broadly in rendering forms naturalistically, the emphasis leans toward the ideal of Renaissance art as highly rational. There remains the...