building having many columns
• (a.) Having many columns; -- said of a building, especially of an interior part or court; as, a polystyle hall. • (n.) A polystyle hall or edifice.
Pol'y·style adjective [ Greek ... with many columns; 
In architecture the term polystyle describes a structure as having many columns. It is said of a building, especially of an interior part or court, for example a polystyle hall.