The St. Peter Martyr Altarpiece originally had a predella composed of three panels, each one containing three roundels.   The predella was later separated from the altarpiece, but it has survived.


      1420s Angelico, Fra Tempera on panel
      

St. Catherine of Siena & St. Cecilia
Courtauld Institute ( info page)

Left: ht: 20.6 cm; width: 50 cm 
St. Mary Magdalene, Jesus (Man of Sorrows), St. John the Evangelist
Courtauld Institute ( info page)

St. Catherine of Alexandria & St. Agnes
Courtauld Institute ( info page)

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See the Courtauld predella, 3 panels, 7 roundels -

Intro page

Three predella panels bearing seven roundels:
Christ as Man of Sorrows, flanked by (six) saints. 1420s (Courtauld Institute of Art) - 

Left:  St.  Catherine of Siena, St. Cecilia, St. Mary Magdalene;

Right: St. John the Evangelist; St. Catherine . . .; St. Agnes

Left:     Saint Catherine of Siena and Saint Cecilia (left);

[St. Catherine of Siena and St. Cecilia
Center:  St. Mary Magdalene, Christ as Man of Sorrows, St. John the Evangelist
Right:   St. Catherine [of Alexandria?>] and St. Agnes 

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