Micronations and Simultations
Cordial Kingdom of Kelterspruf, Empire of Corumburg, Empire of Kanjiri, Empire of Leblandia, Empire of Ozarkia, Empire of Thrace, Great United Kiseean Kingdom, Holy Empire of Réunion, Kingdom of Antrim, Kingdom of Ayllu
Constitutional Monarchies
Article from CBC news on constitutional monarchies around the world.
Constitutional monarchy - Wikipedia
Encyclopedia article on the form of government.