Before the Reformation, who's portraits did catholic artist paint?

Lucas Cranach the Elder, Martin Luther (1528) Perhaps the most prominent artist of the Reformation, Cranach was Luther’s friend and particularly known for painting many portraits of the reformers, including this iconic Luther portrait.

Explanation:

Art in the Protestant Reformation and Counter-Reformation. Hans Holbein the Younger's Noli me tangere a relatively rare Protestant oil painting of Christ from the Reformation period. It is small, and generally naturalistic in style, avoiding iconic elements like the halo, which is barely discernible.