Iconography
Jude is traditionally depicted carrying the image of Jesus in his hand or close to his chest, betokening the legend of the Image of Edessa, recorded in apocryphal correspondence between Jesus and Abgar which is reproduced in Eusebius' History Ecclesiastica, I, xiii. Eusebius relates that King Abgar of Edessa (now Şanlıurfa in southeast Turkey) sent a letter to Jesus seeking a cure for an illness afflicting him. With the letter he sent his envoy Hannan, the keeper of the archives, offering his own home city to Jesus as a safe dwelling place. The envoy painted a likeness of Jesus with choice paints (or alternatively, impressed with Abgar's faith, Jesus pressed his face into a cloth and gave it to Hannan) to take to Abgar with his answer. Upon seeing Jesus' image, the king placed it with great honor in one of his palatial houses. After Christ's execution, Thomas the Apostle sent Jude to King Abgar and the king was cured. Astonished, he converted to Christianity, along with many of the people under his rule. Additionally, St. Jude is often depicted with a flame above his head, representing his presence at Pentecost, when he was said to have received the Holy Spirit with the other apostles.
Read more about this topic: Jude The Apostle