Triptych of the Madonnna and Child: Detail, St. John the Baptist

This is the traditional iconography for portraits of St. John the Baptist: the camel skin, the lamb on the book, and the vexillum proclaiming ecce agnus dei, "Behold the Lamb of God" (John 1:29). View this image in full resolution.
View the entire triptych
Read more about images of St. John the Baptist.

Photographed at the Poreč Basilica by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.