Vestibule (architecture) - Wikipedia
https://en.wikipedia.org/wiki/Vestibule_(architecture)
A vestibule /ˈvɛstɪbjuːl/ is an anteroom (antechamber) or small foyer leading into a larger space such as a lobby, entrance hall or passage, for the purpose of waiting, withholding the larger space view, reducing heat loss, providing storage space for outdoor clothing, etc. The term applies to structures in both modern and classical architecture since ancient times. In modern architecture, a vestib…
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