Deacon Saint, with Saint Anthony Abbot [right panel]

The right panel of Martino di Bartolomeo's triptych, depicting a Deacon Saint with Saint Anthony Abbot from around 1415-20, completes the altarpiece's typological program. The deacon, likely Stephen or Lawrence given the liturgical vestments, and the desert father Anthony whose pig emblem identifies him, represent two complementary forms of Christian sanctity — active service to the community and contemplative withdrawal from it. Martino di Bartolomeo was a competent but not major figure in Sienese painting, his work demonstrating the high average standard of the city's artistic production during the International Gothic period. The triptych format, with its three-panel structure unifying individual figures under a shared gold ground, maintained the devotional function of Sienese altarpieces into the early fifteenth century with remarkable consistency.

The tempera-on-panel technique matches the companion panels in quality and style. The saints' attributes and costumes are rendered with clear iconographic precision, while the gold ground creates visual unity across all three panels of the triptych.