In Greek architecture, a freestanding colonnade or covered walkway; also, a long open building with its roof supported by one or more rows of columns parallel to its rear wall. Stoas lined marketplaces and sanctuaries and formed places of business and public promenades. Rooms might back onto the colonnade, and a second story was sometimes added. The Stoa of Attalus in Athens (2nd century BC), a large, elaborate, two-story building with a row of shops at the rear, was a prime example.
Learn more about stoa with a free trial on Britannica.com.
Stoa (plural, stoae or stoæ) in Ancient Greek architecture; covered walkways or porticos, commonly for public usage. Early stoae were open at the entrance with columns lining the side of the building, creating an enveloping, protective atmosphere and were usually of Doric order. Later examples consisted of mainly two stories, with a roof supporting the inner colonnades where shops or sometimes offices were located and followed Ionic architecture. These buildings were open to the public; merchants could sell their goods, artists could display their artwork, and religious gatherings could take place. Stoae usually surrounded the marketplaces of large cities.