  Robert Grosseteste was one of the most prominent thinkers of the Thirteenth
Century. Philosopher and scientist, he proposed a metaphysics based on the
propagation of light. In this framework, he gave a cosmology too. Here we will
discuss the treatise where Grosseteste proposed it, that entitled 'De luce, seu
de incohatione formarum', 'On Light and the Beginning of Forms'.
