The "Oculist" Sarcophagus:
King David (?)
2nd or 3rd century
Outside the Basilica of San Vitale, Ravenna
This image is on the left front of the "Oculist Sarcophagus" in Ravenna. A figure seated on a throne with a harp surely suggests King David, but the date is very early. Also, the image on the right front includes a figure of Hermes with his caduceus, perhaps not consistent with a Christian or Jewish burial.
This image in full resolution
Other views of the Oculist Sarcophagus
More of King David
Photographed at the site by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.