jan 1, 3700 BC - Trypillian build in Maidanets (Ukraine) settlement which reached 12,000–46,000 inhabitants, and built three-story building.

Description:

https://en.wikipedia.org/wiki/Cucuteni%E2%80%93Trypillia_culture

https://en.wikipedia.org/wiki/Maidanetske

Rassmann, Knut; Ohlrau, René; Hofmann, Robert; Mischka, Carsten; Burdo, Nataliia; Videjko, Michail Yu.; Müller, Johannes (2014). "High precision Tripolye settlement plans, demographic estimations and settlement organization". Journal of Neolithic Archaeology. 16: 96–134. doi:10.12766/jna.2014.3.

"ДОСЛІДИ З ТРИПІЛЬСЬКОГО ДОМОБУДІВНИЦТВА" (PDF). Inst-ukr.lviv.ua. Retrieved 14 November 2016.

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