Jakub Stefan Augustynowicz was an Armenian religious figure, Catholic priest, and leader of the Lviv Catholic Church. He received a doctorate. He was born in Lviv, where he died. He was buried in the crypt of the Armenian Cathedral. Along with portraits of burghers and noblemen, images of clergymen took a significant place in Ukrainian painting. They were painted according to the canonical scheme in the clothes of churchmen of a certain rank. Images of prominent church figures, namely metropolitans, archbishops, and representatives of the clerical elite were introduced into the portrait gallery. The works were often painted in restrained colors, without excessive decorativeness, giving them special expressiveness and attention to the faces and characters depicted. The unknown churchman is shown in liturgical vestments with a pileolus, a headdress worn by priests of the Roman Catholic Church, on his head, making a blessing gesture with his right hand.