There is one more observation that I would like to make about Einstein’s 3-sphere. However incredible it might seem, the same idea had already been conceived by another genius, from an entirely different cultural universe: Dante Alighieri, Italy’s greatest poet. In the Paradiso, the third part of his major poem, the Divine Comedy (La Divina Commedia), Dante offers a grandiose vision of the medieval world, calqued on the world of Aristotle, with the spherical Earth at its center, surrounded by the celestial spheres
