St Peter Martyr Altarpiece, predella – Saints Catherine of Alexandria and Agnes Fra Angelico (1400-1455)

The composition presents two female figures contained within circular medallions, set against a dark background that emphasizes their luminosity and isolation. The medallions are framed by elaborate gilded ornamentation, suggesting a preciousness and sanctity associated with the depicted individuals.
On the left, a woman is portrayed wearing a regal crimson gown adorned with gold detailing and a golden crown. She holds a palm branch in her left hand and a wheel – a significant attribute – in her right. The wheel’s presence immediately signals themes of suffering, endurance, and martyrdom, referencing the traditional narrative surrounding this figures persecution. Her gaze is directed towards the viewer, conveying a sense of serene dignity despite the implied ordeal.
The woman on the right wears a blue robe with long sleeves, clasped at the neck. She holds a cross in her left hand and what appears to be a lamb – a symbol of innocence and Christ – in her right. Her expression is gentle and contemplative; she looks slightly downwards, suggesting humility and devotion. The color blue often signifies royalty or divine grace, reinforcing the spiritual significance of this figure.
The arrangement of these two figures within the predella suggests a pairing based on shared virtues or narratives. Both women are presented as exemplars of faith and resilience in the face of adversity. The circular format lends them an almost celestial quality, elevating them beyond earthly concerns.
The gilded frame serves not only to highlight the figures but also to create a sense of enclosure, reinforcing their status as sacred icons worthy of veneration. The overall effect is one of quiet solemnity and spiritual contemplation, inviting viewers to reflect on themes of faith, sacrifice, and divine grace.