1. The medieval situation -- 2. Reservations -- 3. Selected materials: the classical period The Somnium Scipionis -- Lucan -- Statius, Claudian, and the Lady Natura -- Apuleius, De Deo Socratis -- 4. Selected materials: the seminal period Chalcidius -- Macrobius -- Pseudo-Dionysius -- Boethius -- 5. The heavens The parts of the universe -- Their operations -- Their inhabitants -- 6. The Longaevi -- 7. Earth and her inhabitants The Earth -- Beasts -- The human soul -- Rational soul -- Sensitive and vegetable soul -- Soul and body -- The human body -- The human past -- The seven liberal arts -- 8. The influence of the model