Looks a lot like the shroud of Turin, which I don’t think could be seen at that time or could it? Were these representations of Jesus based on fact somehow communicated down through the ages? Previous paintings based on an original?
During Botticelli’s lifetime (c. 1445 – 1510), the Shroud was not yet in its permanent home in Turin cathedral. Rather, it was owned by the Dukes of Savoy, and apparently the Dukes moved it around a bit. It certainly had been on public display at various points. The first public records about the Shroud in the 1380s concern its public display at a church in Lirey, France.