The Fujian Tulou are Chinese fortified earth buildings (12th–20th cent.), mostly circular or rectangular in configuration, five stories high & capable of housing up to 800 people. They functioned as village units, offering shelter & a sense of community en.wikipedia.org/wiki/Fujian_Tu
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The shabonos (or yanos), circular communal dwellings of the Yanomami tribes of Southern Venezuela and Northern Brazil socks-studio.com/2016/11/16/com
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'Civitas veri sive morum' [The City of Truth; or, Ethics] (1609) by Bartolomeo Del Bene books.google.at/books?id=X11a3
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And, of course, to close the circle, the Apple Park en.wikipedia.org/wiki/Apple_Park
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And here's an interesting read on the circular/radial model
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The 'Happy Colony' of Robert Pemberton ['Ground plan of the model town for the happy colony. To be established in New Zealand by the workmen of Great Britain' and 'A View of the Colleges for the Happy Colony'] (London, 1854)
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'Concentric Field' from Lebbeus Woods' series 'Centricity' (1987)
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Also, the ideal city of Chaux by Claude-Nicolas Ledoux (1773-1806), half-built as the Royal Saltworks at Arc-et-Senans.
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