In the third and final part of The Divine Comedy, Dante recounts his journey through heaven, after the travails and torments of Hell and the arduous ascent of Mount Purgatory, creating a cosmology of the highest realm of creation which is astonishing in its complexity. In Dante's imagining, Paradise is formed out of concentric spheres surrounding the Earth, beginning with the Moon and ending with the Empyrean. Dante must traverse these ethereal regions guided by his beloved B