The sculpture of Ancient Greece is the main surviving type of Ancient Greek art. Modern scholarship identifies three major stages in sculpture in bronze and stone: the Archaic (c. 650-480 BC), Classical (c. 480-323 BC) and Hellenistic.

The Ancient Greeks decided very early on that the human form was the most important subject for artistic endeavour. Seeing their gods as having human form, there was little distinction between the sacred and the secular in art; the human body was both secular and sacred. The statue, originally singular but by the Hellenistic period often in groups was the dominant form, though reliefs, were also important.
Archaic
Free-standing figures share the solidity and frontal stance characteristic of Eastern models, but their forms are more dynamic than those of Egyptian sculpture. After about 575 BC, figures such as these, both male and female, began wearing the so-called ‘archaic smile’. This expression, which has no specific appropriateness to the person or situation depicted, may have been a device to give the figures a distinctive human characteristic.

Three types of figures prevailed—the standing nude male youth (kouros, plural kouroi), the standing draped girl (kore, plural korai), and the seated woman. All emphasize and generalize the essential features of the human figure and show an increasingly accurate comprehension of human anatomy.
The Moschophoros or calf-bearer, c. 570 BC. Acropolis Museum. (c) Marsyas Peplos Kore, c. 530 BC. Acropolis Museum. (c) Marsyas Dipylon Kouros, c. 600 BC. Ceramic Museum, Athens. (c) Marsyas Relief of the Siphnian Treasury, Delphi, depicting a Gigantomachy, c. 525 BC. Delphi Archaeological Museum. (c) Tetraktys
Classical
The Classical period saw changes in the style and function of sculpture, along with a dramatic increase in the technical skill of Greek sculptors in depicting realistic human forms. Poses also became more naturalistic, notably during the beginning of the period.

From c. 500 BC, Greek statues began increasingly to depict real people, as opposed to vague interpretations of myth or entirely fictional votive statues, although the style in which they were represented had not yet developed into a realistic form of portraiture.
The Classical Period also saw an increase in the use of statues and sculptures as decorations of buildings. The characteristic temples of the Classical era, such as the Parthenon in Athens, and the Temple of Zeus at Olympia, used relief sculpture for decorative friezes, and sculpture in the round to fill the triangular fields of the pediments.
2. Venus Braschi by Praxiteles, Munich Glyptothek.
3. Copy of Polyclitus’ Diadumenos, Athens National Archaeological Museum. (c) Tetraktys
4. Riace Bronzes, Statue A. National Museum of Magna Graecia, Calabria. (c) Luca Galli
5. The Marathon Youth, 4th c. BC, possibly by Praxiteles, Athens National Archaeological Museum. (c) Jastrow
6. The Charioteer of Delphi, c. 478-74 BC. Delphi Museum. (c) RaminusFalcon
7. Parthenon frieze. British Museum. (c) joyofmuseums.com
Hellenistic
Ancient Greek art became increasingly diverse, influenced by the cultures of the peoples drawn into the Greek orbit, by the conquests of Alexander the Great.

During this period, sculpture again experienced a shift towards increasing naturalism. Common people, women, children, animals, and domestic scenes became acceptable subjects for sculpture, which was commissioned by wealthy families for the adornment of their homes and gardens. Realistic figures of men and women of all ages were produced, and sculptors no longer felt obliged to depict people as ideals of beauty or physical perfection.
The Winged Victory of Samothrace. Louvre. (c) Adam Carr Hellenistic prince, 2nd c. BC. Relief from the Pergamon Altar, depicting the Gigantomachy. Pergamon Museum, Berlin. (c) Claus Ableiter Jockey of Artemision. Athens National Archaeological Museum. (c) Marsyas