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) Southeastern Europe
                                               1 (Country) Croatia (1991-present)
                                               2 (Country) Bosnia and Herzegovina (1992-present)
                                               3.1 (Country) Serbia (2006-present)
                                               3.2 (Country) Montenegro (2006-present)
                                               3.3 (Country) Kosovo (2008-present)
                                               4 (Country) Romania (1878-present)
                                               5 (Country) Bulgaria (1878-present)
                                               6 (Country) North Macedonia (2019-present)
                                               7 (Country) Albania (1912-present)
                                               8 (Country) Greece (1830-present)
                                               9.1 (Country) Cyprus (1960-present)
                                               9.2 (Territory) Akrotiri (United Kingdom: 1960-present)
                                               9.3 (Territory) Dhekelia (United Kingdom: 1960-present)