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) Central Africa
                                             (Country) Chad (1960-present)
                                               01.1 (Region) Tibesti (Chad)
                                               01.2 (Region) Borkou (Chad)
                                               01.3 (Region) Ennedi (Chad)
                                               02.1 (Region) Kanem (Chad)
                                               02.2 (Region) Barh el Gazel (Chad)
                                               03 (Region) Lac (Chad)
                                               04 (Region) Hadjer-Lamis (Chad)
                                               05 (Region) Batha (Chad)
                                               06 (Region) Wadi Fira (Chad)
                                               07.1 (Region) Ouaddaï (Chad)
                                               07.2 (Region) Sila (Chad)
                                               08 (Region) Salamat (Chad)
                                               09 (Region) Guéra (Chad)
                                               10.1 (Region) Chari-Baguirmi (Chad)
                                               10.2 (Region) Ville de N'Djamena (Chad)
                                               11 (Region) Mayo-Kebbi Est (Chad)
                                               12 (Region) Tandjilé (Chad)
                                               13 (Region) Moyen-Chari (Chad)
                                               14 (Region) Mandoul (Chad)
                                               15 (Region) Logone Oriental (Chad)
                                               16 (Region) Logone Occidental (Chad)
                                               17 (Region) Mayo-Kebbi Ouest (Chad)