Peripteros (Greek: Περίπτερος) is the special name given to a type of ancient Greek or Roman temple surrounded by a portico with columns. It refers to the useful element for the architectural definition of buildings surrounded around their outside by a colonnade (pteron) on all four sides of the cella (naos), creating a four-sided arcade (peristasis). By extension, it also means simply the perimeter of a building (typically a classical temple), when that perimeter is made up of columns. The term is frequently used of buildings in the Doric order.
The peripteros can be a portico, a kiosk or a chapel. If it made up of four columns, it is tetrastyle; of 6, hexastyle; of 8, octastyle; of 10, decastyle; and of 12, dodecastyle. If the columns are fitted into the wall instead of standing alone, it is called a pseudo-peripteros.