Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Astra Plinius - celestial bodies
         Universe
           (Supercluster) Virgo-Hydra-Centaurus Supercluster
             (Supercluster) Virgo Supercluster
               (Cluster) Local Group
                 (Galaxy) Milky Way Galaxy veter.
                   (Spiral arm) Orion Arm
                     (Region) Local Bubble
                       Local Interstellar Cloud
                         (Planetary system) Solar System
                           (Planet-satellite system) Earth System
                             (Planet) Earth veter.
                               "spheres" (Earth)
                                 (Sphere) Biosphere (Earth) - zone of life
                                   "geopolitical regions"
                                     (Region) World
                                       (Region) Old World
                                         (Region) Africa
                                           (Region) Eastern Africa
                                             (Country) Eritrea (1993-present)
                                               1 (Division) Gash Barka (Eritrea)
                                               2 (Division) Anseba (Eritrea)
                                               3 (Division) Ma'akel (=Central; Eritrea)
                                               4 (Division) Debub (=South; Eritrea)
                                               5 (Division) Semenawi Keyih Bahri (=Northern Red Sea; Eritrea)
                                               6 (Division) Debubawi K'eyih Bahri (=Southern Red Sea; Eritrea)