Trantor

Trantor is a fictional planet from Isaac Asimov's "Foundation" series, serving as the political and cultural hub of a vast galactic empire. It’s known for being entirely covered by a sprawling, dense city—essentially a giant, urbanized world with no natural landscapes visible. Trantor functions as the administrative core, hosting the imperial government and its institutions. Its centralized, urban nature symbolizes the complexity and interconnectedness of the empire, and it plays a crucial role in shaping the series’ storylines about politics, power, and the future of civilization.