Cupola cappella chigi

The dome is divided into eight compartments radiating from a central medallion that depicts God the Father in a gesture of creation. Each surrounding panel contains a personification of a planet from classical antiquity—including the Sun and Moon—accompanied by an angel who directs its movement through the zodiac. Below the dome, the architectural frieze contains a Latin dedication and is supported by pendentives featuring frescoes of the prophets.

This decorative program represents the High Renaissance synthesis of Neoplatonic cosmology and Christian theology, where the pagan planetary deities are integrated into a divinely ordered universe moved by angelic intelligences. This specific arrangement reflects the influence of Marsilio Ficino's ideas regarding the harmony between the celestial bodies and divine providence.