Justin, surnamed the Martyr, an early Christian apologist, born in Sichem, Samaria; a heathen by birth, who studied philosophy in the Stoic and Platonic schools, and was converted to Christianity from observing the strength of the convictions with which it was embraced; was the author of two "Apologies for the Christians," rather than for Christianity or its dogmas, and a "Dialogue with Trypho the Jew," and suffered martyrdom in 168. Festival, June 12.