Shrine of Saint Victor, Early Christian chapel in Basilica of Sant'Ambrogio, Milan, Italy.

The Shrine of Saint Victor is an early Christian chapel decorated with gilded mosaics on its walls and ceiling within the Sant'Ambrogio complex in Milan. The structure displays the architecture and decoration of the first centuries of the Christian church, featuring mosaics that portray various holy figures.

The chapel was commissioned by Bishop Maternus in the first half of the 4th century, making it older than the Basilica of Sant'Ambrogio itself. Saint Ambrose later had his brother Satyrus buried beside the martyr Victor. The mosaics are debated: some scholars place the ceiling before 313, others the walls shortly after Ambrose's death, while recent studies favour the second half of the 5th century.

The name 'in ciel d'oro' comes from the gold-tesserae mosaic vault, where Victor's portrait sits inside a triumphal wreath of wheat ears and fruits, pagan symbols of the seasons and eternity. On the walls, six full-length saints are labelled in Latin, among them the Milanese bishops Ambrose and Maternus.

The chapel opens off the right nave of the Basilica of Sant'Ambrogio, near the entrance to the porticoed atrium, not in a separate northern wing. It is a small, dim space entered through a doorway from the church interior, so visitors should allow time to let their eyes adjust to see the gold mosaics.

The vault is entirely covered in gold mosaic tesserae, not gold leaf, which gives the chapel its Italian name 'San Vittore in ciel d'oro'. At its centre, above the tomb, Victor's bust is ringed by a triumphal garland of wheat ears and fruits, pagan symbols of the seasons and thus of eternity.