The earliest examples of life-sized statues of Apollo, may be two figures from the Ionic sanctuary on the island of Delos. Such statues were found across the Greek speaking world, the preponderance of these were found at the sanctuaries of Apollo with more than one hundred from the sanctuary of Apollo Ptoios, Boeotia alone. The last stage in the development of the Kouros type is the late archaic period (520–485 BC), in which the Greek sculpture attained a full knowledge of human anatomy and used to create a relative harmonious whole. Ranking from the very few bronzes survived to us is the masterpiece bronze Piraeus Apollo. It was found in Piraeus, the harbour of Athens. The statue originally held the bow in its left hand, and a cup of pouring libation in its right hand. It probably comes from north-eastern Peloponnesus. The emphasis is given in anatomy, and it is one of the first attempts to represent a kind of motion, and beauty relative to proportions, which appear mostly in post-Archaic art. The statue throws some light on an artistic centre which, with an independently developed harder, simpler, and heavier style, restricts Ionian influence in Athens. Finally, this is the germ from which the art of Polykleitos was to grow two or three generations later.

What period ran from 520-485 BC?