The remains of the temple of Apollo date from its sixth reconstruction (373 BC) that followed the shape and dimensions of the preceding structure (548-514 BC). It is a Classical Doric peripteral temple, hexastyle (6 x 15 columns in plastered tufa), with a bluish limestone base (about 60 x 23 meters) built over a beehive of artificial terraces. The cella, peristasis, pronaos and opisthodomos were decorated with works of art. A staircase at the back of the cella led to the adyton of the Pythia.
For more information about Delphi and the temple of Apollo see Delphi in the Knowledge Center.