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This is a diagram of the Athena Temple in Priene. It is the class model for Greek temple architecture.
The following is a portion of a helpful article in Wikipedia. The links in the article will take you to Wikipedia.
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.