The Baptism and Ordination of St. Timothy
Marian Oratory in the Basilica of Santa Pudentiana, Rome
The damaged image on the left is of the ordination of St. Timothy, with St. Paul in the center (with the halo).
The image on the right shows Paul baptizing St. Timothy and St. Novatus (said by Roman tradition to be his brother). The two are incongruously placed in the kind of small baptismal font that came into use after adult baptisms became less frequent. Presumably the other prominent figures in the baptism image are St. Pudens (supposedly the father of the two men) and SS. Praxedes and Pudentiana (their sisters).
Read more about images of St. Timothy.
Read more about images of Saints Praxedes and Pudentiana.
Photographed at the basilica by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.