Natura - nature actualia - actual entities Mundus Plinius - physical world [Sphaerae - spheres] 1.1 Caelum veter. - region of the fixed stars 1.1.0 [cœlum - heavens] see Region Caelum veter. 1.2 Astra Plinius - celestial bodies 2 particles 2.0 [Elementa - elements] 3 naturalia - natural bodies 4 artefacta - artefacts