The Triumphal Arch at Santa Maria Maggiore: Right side

5th century
Mosaic
Basilica of Santa Maria Maggiore

Top register: The Presentation in the Temple and The Angel Warns Joseph
Second register: The governor and people of Sotinen, Egypt, greet the Christ Child as "God of gods" (Pseudo-Matthew, 22). The female figure standing with St. Joseph duplicates the one in the left side of the register, who there represents Ecclesia, the Church. Here she represents both the Church and Mary, or rather she is the "Maria Ecclesia"
Third register: The Magi with Herod
Bottom register: The Apostles as sheep at the gate of Bethlehem

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Read more about the Presentation in the Temple, St. Joseph, and the Magi.

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