Ecumenopolis

[3] When made public, Doxiadis' idea of ecumenopolis seemed "close to science fiction", but today is "surprisingly pertinent" according to geography researchers Pavle Stamenovic, Dunja Predic and Davor Eres,[1] especially as a consequence of globalization.

[4] In 2008, Time magazine coined Nylonkong to link New York City, London, and Hong Kong as the eperopolis of the Americas, Euro-Africa and Asia-Pacific respectively.

[8] A central setting in the tabletop wargame Warhammer 40,000 is a portrayal of Earth in the far future, where it is described as having been transformed into a vast, Gothic-style ecumenopolis sometime during the 30th millennium AD after its establishment as the capital of an interstellar superpower known as the Imperium of Man.

The ecumenopolis contains multiple continent-scale districts housing different branches of society and government, with the Imperial Palace alone taking up the entirety of the Himalayan Mountains.

by Tsutomu Nihei is set in a far future in which Earth has become the ruins of planet-covering city, which is suggested to be so large that it has consumed most of the Solar System as well, it may also be along the lines of a hollow-world or dyson shell.