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) Eurasia
                                           (Region) Europe
                                             (Region) Eastern Europe
                                               (Country) Estonia (1991-present)
                                                 (County) Harjumaa (Estonia)
                                                 (County) Hiiumaa (Estonia)
                                                 (County) Ida-Virumaa (Estonia)
                                                 (County) Jarvamaa (Estonia)
                                                 (County) Jogevamaa (Estonia)
                                                 (County) Laane-Virumaa (Estonia)
                                                 (County) Laanemaa (Estonia)
                                                 (County) Parnumaa (Estonia)
                                                 (County) Polvamaa (Estonia)
                                                 (County) Raplamaa (Estonia)
                                                 (County) Saaremaa (Estonia)
                                                 (County) Tartumaa (Estonia)
                                                 (County) Valgamaa (Estonia)
                                                 (County) Viljandimaa (Estonia)
                                                 (County) Vorumaa (Estonia)