A Pope (Saint Gregory?) and Saint Matthias

This picture and 'Saints Jerome and John the Baptist' are two sides of a single panel that was divided in two. The panel had been part of a double-sided triptych in Santa Maria Maggiore, Rome. The other side panel of the triptych, also sawn in half, showed Saints Peter and Paul on one side and Saint John the Evangelist (?) and Saint Martin on the other. One central panel was of the Assumption of the Virgin while the other showed the Miracle of the Snow, and the founding of Santa Maria Maggiore.

Masolino probably completed the altarpiece after Masaccio's death in Rome in 1428.