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) Western Africa
                                             01 (Country) Cabo Verde (1975-present)
                                             02 (Country) Mauritania (1960-present)
                                             03 (Country) Senegal (1960-present)
                                             04 (Country) The Gambia (1965-present)
                                             05 (Country) Guinea-Bissau (1974-present)
                                             06 (Country) Guinea (1958-present)
                                             07 (Country) Sierra Leone (1961-present)
                                             08 (Country) Liberia (1847-present)
                                             09 (Country) Cote d'Ivoire (1960-present)
                                             10 (Country) Mali (1960-present)
                                             11 (Country) Burkina Faso (1960-present)
                                             12 (Country) Ghana (1957-present)
                                             13 (Country) Togo (1960-present)
                                             14 (Country) Benin (1960-present)
                                             15 (Country) Niger (1960-present)
                                             16 (Country) Nigeria (1960-present)