Vintage cosmology proves impressive …

… History: A medieval multiverse : Nature News & Comment.

De Luce (On Light), written in 1225 in Latin and dense with mathematical thinking, explores the nature of matter and the cosmos. Four centuries before Isaac Newton proposed gravity and seven centuries before the Big Bang theory, Grosseteste describes the birth of the Universe in an explosion and the crystallization of matter to form stars and planets in a set of nested spheres around Earth. … Grosseteste's thesis demonstrates how advanced natural philosophy was in the thirteenth century — it was no dark age.

Well, the so-called Dark Ages were a few centuries earlier. Grosseteste lived during the High Middle Ages.