During the twelfth-century Renaissance, the natural was conceptually separated from the supernatural and made an object of study in its own right. Bernardus Silvestris’ popular allegorical poem Cosmographia constitutes a major literary testament to the change in attitude. He weaves the cosmological concerns of the cathedral school of Chartres, which aimed above all to reconcile Plato’s account of the formation of the world through the demiurge in the Timaeus with the scriptural account of creation ex nihilo in Genesis, together with the metaphysics and mystical sacramental hierarchy of the Neoplatonic tradition going back to Pseudo-Dionysius and Johannes Scotus Eriugena. The poem falls into two parts, Megacosmos, detailing the story of the original formation of the world out of the primordial chaos, and Microcosmos, having specifically to do with the creation of man in God’s image. The allegorical personalities that figure in the first part are Nature, Noys, Silva (formless chaos), Endelechia and Physis, while in the second part, these undertake a pilgrimage to seek out the muse Urania, who represents the celestial intelligence in man, whose mind is compounded of higher and lower. The epic is interrupted in places by lengthy descriptive passages that dwell on flora and fauna, reminiscent of Basil the Great’s Hexaemeron from the fourth century. The format fosters Bernardus’ penchant for keen psychological observation and one is struck by how optimistic the tone is (as when, near the beginning, Nature prevails on Noys to embellish the created world with an even more beautiful form). For something akin and more recent, compare with the psychological drama in Goethe’s allegorical play Pandora. One could regret that Bernardus fails to compose a third part dealing with the fall and the restoration of man by Christ, a topic Alain de Lille would take up later in the twelfth century in his Anticlaudianus. If he had, perhaps he could have rivaled John Milton! As it stands, though, the poem is engaging as far as it goes. From the standpoint of intellectual history, for the most part derivative and ripe; late in the twelfth century, the alliance between Platonic proto-scientific speculation and classical Latin literature was due to pass out of style and the schoolmen of the thirteenth century would head off in another direction, almost exclusively scientific rather than literary, under the star of the newly recovered writings of Aristotle and his Arabic commentators.