North transept, Cathedral of St. Mary, Pamplona, Spain
The book in St. Jerome's left hand, rather too slim to be a Bible, is probably the Regula Monachorum, the monastic rule wrongly attributed to him in the Middle Ages. The trumpet refers to a warning in that rule about the Last Judgment. The lion is among the most common attributes in portraits of this saint. For a time he served as an adviser to Pope Damasus I, so he is often pictured in the red garb of a cardinal.
Read more about St. Jerome.
Photographed at the cathedral by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.