Ar tonelico
Each one of the three Towers of Ar tonelico is administrated by a "Reyvateil Origin", but after the Grathnode Inferia, the people relocated themselves to the upper areas of the regions where they lived, barely escaping death, and since this isolated the Towers from each other, they eventually came to believe that the region where they lived was everything that existed around them, which is why they call each region a world. Therefore, the world around the Tower administrated by Eoria is called ", the world around the Tower administrated by Frelia is called " and finally, the world around the Tower administrated by Tyria is called "".