'The Protectorate' is the term the Celestrian's use to refer to the mortal realm. It includes all continents, settlements, oceans and other land masses that spread across the world. The Protectorate is occupied by both humans and monsters alike.
Apart from the Observatory and the Realm of the Almighty, all cities, dungeons and grottoes can be found on the Protectorate. It is where the vast majority of the Hero's adventures take place and time is spent.