Nicolò di Pietro
St. Augustine Teaching Rhetoric

Tempera and gold on wood panel
Pinacoteca Vaticana, Rome

From a predella. I can't make out the first word in the book; the second is retoricae, "of rhetoric."

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Also see the first and third of the four panels in the predella.
Read more about St. Augustine.

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