The Divine Comedy is an epic poem by Dante Alighieri, written between 1308 and 1321, and it's considered one of the greatest works of world literature. It contains the Inferno, Purgatory, and Paradise: the three levels which Dante must undergo on his way to meet God.

Though it sounds like a seedy nightclub, Dante's Paradise is the third and final part of the Divine Comedy. It details Dante's journey through the rings of heaven. His tour guide is Beatrice, who was a childhood friend and unrequited love of Dante's in 14th century Florence. Virgil, who led the author through the rings of Hell and Purgatory, couldn't come along on this trip because he was a pagan. Dante travels through the nine spheres on his way to Empyrean, which is where God lives. The spheres are represented by the Moon, Mercury, Venus, the Sun, Mars, Jupiter, Saturn and various stars, and roughly correlate to what was known of astronomy at the time - plus a healthy dash of astrology.