[Ancient Rome] A tholos (sometimes tholus, from Ancient Greek θόλος) is an ancient Roman feature found in the macellum. It is a round structure, usually built upon a couple of steps (a podium), with a ring of columns supporting a domed roof. It has been suggested that the tholos, well provided with water and drains, was where fish were...
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http://en.wikipedia.org/wiki/Tholos_(Ancient_Rome)

(from the article `Athens`) ...and some secular buildings in the Agora, notably the Stoa Poikile, or Painted Colonnade, with its famous paintings by Polygnotus and Micon, one of ...
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http://www.britannica.com/eb/a-z/t/40

in ancient Greek architecture, a circular building with a conical or vaulted roof and with or without a peristyle, or surrounding colonnade. In the ... [4 related articles]
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http://www.britannica.com/eb/a-z/t/40
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