Focus on San Pietro Martire Triptych and explain the abstract.
The St. Peter of Verona Triptych (Italian: Trittico di San Pietro Martire) is a tempera-on-panel painting by the Italian early Renaissance master Fra Angelico, executed around 1428–1429. It is  housed in the National Museum of San Marco in Florence, Italy.
Museum of San Marco Fra Angelico Peter of Verona