Proposed arcologies

An arcology or vertical city is a hypothetical mixed-use megastructure featuring high population density with the goal of autarky from the outside environment. The term was coined in 1969 by architect Paolo Soleri as a portmanteau of "architecture" and "ecology." Soleri believed that a completed arcology would provide space for a variety of residential, commercial, and agricultural facilities while minimizing individual human environmental impact.

linear smart city in Tabuk, Saudi Arabia

right|thumb|A depiction of a planetwide city, which the artist considers suitable for both Trantor, a fictional ecumenopolis from Isaac Asimov's Galactic Empire, and [[Coruscant in the Star Wars franchise.]]

envisioned building

thumb|alt=|Perspective view of the urban area of Fourier's . Rural area is not shown in the drawing. thumb|North American Phalanx building in [[Monmouth County, New Jersey, inspired by Fourier's concept]]

proposed building

skyscraper in the Tokyo metropolitan area, Japan

proposed structure

urban area under a single roof

unbuild architectural structure in Moscow

floating city project

Proposed building in Tokyo

building

proposed vertical city

micronation