The Triumphal Arch at Santa Maria Maggiore: Left side

5th century
Mosaic
Basilica of Santa Maria Maggiore

Top register: The Annunciation and Joseph's Dream
Second register: The Adoration of the Magi
Third register: The Slaughter of the Innocents
Bottom register: The Apostles as sheep at the gate of Jerusalem

This image in full resolution

Detail images:

View the entire arch

More of the Annunciation
More of St. Joseph
More of the Adoration of the Magi
More of the Slaughter of the Innocents

Photographed at the basilica by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.