The sculpture presents the prophet Aaron, a Jewish high priest and brother of Moses. He was one of the most significant figures in the Old Testament. The classical iconography of the prophet was established by the 10th century. He is often portrayed in sculptural decorations of Gothic churches. According to the texts of the prophet Jeremiah, Aaron should be depicted as an older man with a long beard, wearing a mitre and garments of a priest. The artist depicted him as an elder with grey hair and a long beard. Aaron is clothed in garments of the high priest: a long woven linen chiton and a vestment. He is wearing a turban made of twisted fabric. One of Aaron's attributes is the square priestly breastplate. It contains four rows of three gems each, with every gem engraved with one name of the twelve tribes of Israel. In the saint's right hand is a thurible, his iconographic attribute and a symbol of Orthodox worship. It is a vessel on chains into which frankincense, a fragrant resin of oriental trees, is placed on heated coals. The sculpture features an elongated oval face with a high forehead, prominent almond-shaped eyes, and a wedge-shaped nose. The saint's face is framed by long, engraved strands of grey hair and a beard that descends to the chest. The static image of Saint Aaron is accentuated by straight vertical folds of his garment, which smoothly cascade downward.