It was the ancient Greeks that used stoas. A stoa was a Greek-style covered walkway. Most of them had columns on one side and some had columns lining both sides.
After the retreat of the Persians, a new stoa was built in Athens. It was the Painted Stoa and was erected at the north end of the Agora. This was to become the most famous of all the stoas.
Plato's promenade is a stoa. This is a common clue and answer in crossword puzzles.A stoa is a part of ancient Greek architecture, and was a type of covered public walkway.
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About 40 years after the Painted Stoa in Athens was built, another one had religious themes. It was dedicated to Zeus Eleutherius. It had a Doric style with projecting wings.
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Philosophers.
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The beauty of the Athenian Painted Stoa was due in part to the artwork by three great ancient Greek painters. They were Polygnotus, Micon and Panaenus. Their canvases were wooden and placed on the stone walls of the stoa.