File:Massimo_Pigliucci-Stoa_of_Attalos.jpg · Wikimedia Commons · See Wikimedia Commons
thumb|300px|The restored Stoa of Attalos in Athens, with busts of historical philosophers.
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thumb|300px|The restored Stoa of Attalos in Athens, with busts of historical philosophers.
A stoa (; plural, stoas, stoai, or stoae ), in ancient Greek architecture, is a covered walkway or portico, commonly for public use. Early stoas were open at the entrance with columns, usually of the Doric order, lining the side of a building; they created a safe, enveloping, protective atmosphere.
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