Abgar V Ouchama, king of Edessa who ruled the city between A.D. 13 and 50 figures prominently in the history of the Shroud of Turin. According to an ancient legend, a cloth with an image of Jesus was brought to King Abgar shortly after the death of Jesus.
In the a 10th century painting we see Abgar receiving the picture from the disciple Thaddeus. It is significant in showing that the legend was current in the 10th century Greek-Byzantine world. See: full Painting of Abgar receiving the Image of Edessa from Thaddeus.
From Eusebius of Caesarea we learn of a document that had been in Edessa’s archives. If it ever existed, it is now lost to history. we are told he was a letter written by an ailing King Abgar V and hand delivered to Jesus of Nazareth by an envoy named Ananias. The king had heard of Jesus and asked him to come to Edessa to cure him. In Eusebius’ history we learn that the apostle, Thomas, sent a disciple named Thaddeus sometime after Jesus’ death and that he founded a church in Edessa.
See: Abgar VIII