Sebastian-Altar: Der heilige Sebastian ermutigt Marcus und Marcellus

The Sebastian Altar panel depicting Sebastian encouraging Marcus and Marcellianus — twin deacons wavering in their resolve to face martyrdom — was part of an altarpiece cycle for a church or confraternity dedicated to Sebastian. The episode from the Acts of the Roman martyrs shows Sebastian, himself a Roman officer, secretly encouraging the brothers condemned to death to maintain their faith. The scene required the master to depict an intimate confrontation within a Roman prison setting, a compositional challenge unusual in the Cologne-influenced workshop tradition.

The prison setting is handled through a shallow architectural interior whose barred window establishes the carceral context without demanding sophisticated spatial recession. Sebastian's imperial military costume — borrowed from the iconographic tradition of his own martyr image — makes the figure immediately legible while the twin brothers' emotional states are differentiated through pose and expression.