1. Type of Ancient-Greek portico of limited depth but great length, with a long wall at the back and a colonnade on the front, usually facing a public space, used for promenades, meetings, etc. Some were of two storeys, e.g. Stoa of Attalus, Athens (C2 bc—restored), with Doric columns on the lower storey and Ionic above.
3. Byzantine hall with its roof supported on one or more parallel rows of columns.