Greek pottery is frequently signed, sometimes by the potter or the master of the pottery, but only occasionally by the painter. Hundreds of painters are, however, identifiable by their artistic personalities: where their signatures haven't survived they are named for their subject choices, as "the Achilles Painter", by the potter they worked for, such as the Late Archaic "Kleophrades Painter", or even by their modern locations, such as the Late Archaic "Berlin Painter".
No texts by Pythagoras survive, although forgeries under his name — a few of which remain extant — did circulate in antiquity. Critical ancient sources like Aristotle and Aristoxenus cast doubt on these writings. And ancient Pythagoreans usually quoted their master's doctrines with the phrase autos ephe ("he himself said") — emphasizing the essentially oral nature of his teaching
The variety in Greek religion is also caused by the long history of Greece. Greek religion spans a period from Minoan and Mycenean periods to the days of Hellenistic Greece and its ultimate conquest by the Roman Empire. Religious ideas continued to develop over this time; by the time of the earliest major monument of Greek literature, the Iliad attributed to Homer, a consensus had already developed about who the major Olympian gods were. Still, changes to the canon remained possible; the Iliad seems to have been unaware of Dionysus, a god whose worship apparently spread after it was written, and who became important enough to be named one of the twelve chief Olympian gods.
Late in the history of classical religion, the Neo-Platonists and the Roman emperor Julian attempted to organize classical paganism into a systematic belief system, which they gave the name of Hellênismos to: the belief system of the Greeks. Their failure to do so stemmed from the essentially local and traditional nature of the religion they sought to protect. Since classical paganism even at that late date was chiefly a matter of following a local tradition, rather than commitment to an overarching belief system and body of doctrine, their rear-guard attempt to create an overarching structure or body of doctrine came too late.
As with pottery, the Greeks did not produce sculpture merely for artistic display. Statues were commissioned either by aristocratic individuals or by the state, and used for public memorials, as offerings to temples, oracles and sanctuaries (as is frequently shown by inscriptions on the statues), or as markers for graves. In the Archaic period, statues were never intended to be representations of actual individuals. They were depictions of an ideal — beauty, piety, honour or sacrifice. They were always depictions of young men, ranging in age from adolescence to early maturity, even when placed on the graves of (presumably) elderly citizens. Kouroi were all stylistically similar. Gradations in the social importance of the person commissioning the statue were indicated by size rather than artistic innovation.
Finally every Greek town had a theatre. These were used for both public meetings as well as dramatic performances. These performances originated as religious ceremonies; they went on to assume their Classical status as the highest form of Greek culture by the 6th century BC (see Greek theatre). The theatre was usually set in a hillside outside the town, and had rows of tiered seating set in a semi-circle around the central performance area, the orchestra. Behind the orchestra was a low building called the skene, which served as a store-room, a dressing-room, and also as a backdrop to the action taking place in the orchestra. A number of Greek theatres survive almost intact, the best known being at Epidaurus.
One of the earliest attempts to give a theology to the Greek religion is found in the works of the poet Hesiod, whose Theogony provides a creation myth focusing on deified abstractions like Night and Time. The decision as to which deities were considered major enough to number among the Twelve Olympians who were the chief gods of the pantheon was no doubt a political decision, at least in part. Because most of the gods were originally local, and inconsistent stories were told of them from one locality to another, the faith of the ancient Greeks resisted systematization, at least at first. Socrates and other philosophers were accused of atheism by the populists of Athens when they pointed out the difficulties in accepting the received ideas about the gods as a whole. Yet Socrates' view of the gods was ultimately to triumph; as time went on, the traditional piety of the sacrificial rites tended to be dismissed as a sort of folklore, while those who were philosophically minded tended to believe in abstract, remote, and genteel gods who vaguely acted to uphold social norms and public virtues.
The transition from the Classical to the Hellenistic period occurred during the 4th century. Following the conquests of Alexander the Great (336 BC to 323 BC), Greek culture spread across the known world as far as India. Thus it became more diverse and more influenced by the cultures of the peoples drawn into the Greek orbit. In the view of most art historians, it also declined in quality and originality; this, however, is a subjective judgement which artists and art-lovers of the time would not have shared. New centres of Greek culture, particularly in sculpture, developed in Alexandria, Antioch, Pergamum, and other cities. By the 2nd century the rising power of Rome had also absorbed much of the Greek tradition — and an increasing proportion of its products as well.
According to Iamblichus, the Pythagoreans followed a structured life of religious teaching, common meals, exercise, reading and philosophical study. We may infer from this that participants required some degree of wealth and leisure to join the inner circle. Music featured as an essential organizing factor of this life: the disciples would sing hymns to Apollo together regularly; they used the lyre to cure illness of the soul or body; poetry recitations occurred before and after sleep to aid the memory.
Several anecdotes suggest that Thales was not solely a thinker; he was involved in business and politics. One story recounts that he bought all the olive presses in Miletus after predicting the weather and a good harvest for a particular year. Another version of this same story states that he bought the presses to demonstrate to his fellow Milesians that he could use his intelligence to enrich himself. Herodotus recorded that Thales advised the city-states of Ionia to form a federation.