Lucas Cranach
St. Stephen

1502
Woodcut
From the Missale Pataviense (Vienna: Winterburger, 1512)

It is traditional for a few stones to be used as St. Stephen's attribute, as they were the instrument of his martyrdom. However, it is unusual for him to be holding a whole collection of them in the skirt of his dalmatic. the garment that deacons wear during the Mass, similar to the pries's chasuble but with sleeves

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Source: this page at Wikimedia Commons..