The erection of a building – whether temple, treasury, colonnade, or theatre – argues purpose, means, advance planning, and commitment over many years. The number of people involved in any communal project, from sponsors (whether states, individuals, or sanctuary officials) to designers, architects, masons, and sculptors, was enormous. In studying architectural sculpture, we are face to face with originals, usually found in context, with some closely dated on the basis of inscriptions and references in written texts; although the later writers who held free-standing sculpture in such high regard had little to say about architectural compositions. The embellishment was usually added to religious buildings: the temples and treasuries that were erected in local and Panhellenic sanctuaries. The subjects chosen were mainly myths, with themes repeated down the centuries (Battles of the Gods versus the Giants, and Greeks versus Amazons, Centaurs, or Trojans) – they became the default choice, the stock-in-trade, and raise the question of the extent to which there was indeed any specific programmatic intent or local significance behind these mythical encounters. Who chose the subjects? With what purpose? To instruct, to underline social cohesion, to express political identity, to demonstrate superiority? Who were the viewers the designers had in mind? As the brightly coloured sculptures were integral to the building and came to be placed high above the heads of viewers, visitors, and pilgrims, they were obviously intended to take notice of them. Can we know what their reactions were and how deep their understanding was? Euripides in his tragedy Ion (412 BC) presents a chorus of Athenian women on their first visit to Delphi (vv. 184–218). They look up at the sculptures on the outside of the Apollo temple and express wonder and excitement at the figures they can recognize: Herakles, Pegasos, the battle of the Gods and the Giants, and particularly their own patron goddess, Athena. Euripides fits their reactions to their status – they are just glad to identify their favourites, and delight, as it were, at meeting old friends.