In the mid-20th Century, in Europe, several traditional hereditary monarchies managed to survive both world wars, remaining independent and retaining their original form of government. Among these were Boravia, Carabas, Cornovia, Gardevia, Gavonia, Granaco, Kravia, Markovia, Moldacia, Norania, Numark, Offalia, Pan Balgravia, Ruina, Sardonia, Solvonia, and Valdania. Others, such as Cerania, Emporia, Patrania, or Resbia, are confirmed to have survived the First World War, but are not known to have survived the second.
As a teenager, Clark Kent once fell out of an airplane and landed in Sardonia, and had adventure outwitting an evil prince and his henchmen.
- Sardonia is a hereditary monarchy on Earth-One, that Superboy visited one time. Sardona is a beleagured democracy in the Quality Universe, that Blackhawk once defended from Red aggression.