In Saint Sebastian, Antonello da Messina presents the figure of the martyr in a dramatic pose, bound to a tree. The use of rich colors, particularly reds and greens, enhances the emotional intensity of the scene. The background is simple, focusing the viewer's attention on the figure of Saint Sebastian.

His expression conveys both pain and serenity, inviting contemplation of his suffering. The painting is executed in oil on panel, a common medium during the Northern Renaissance. Antonello's technique showcases detailed textures, especially in the depiction of the skin and fabric. The light source appears to come from the left, casting shadows that add depth to the figure.

This careful attention to light and detail is characteristic of Antonello's style. Antonello da Messina was a prominent artist of the Italian Renaissance, known for his innovative use of oil paint. Saint Sebastian is notable for its emotional depth and realism, setting it apart from other depictions of the martyr. Interestingly, this work reflects the influence of Flemish painting, which Antonello encountered during his travels.

This blend of styles contributes to its unique character in the history of art.