In order to paint the portraits, I have looked at numerous pictures and miniatures. Below is a collection of some of my favourites. Note that this is a work in progress.
a) Watch him grow up in the miniatures:
From the British Library
b) Other images
The only real lifetime portrait painting (and even that is a copy), painted by Rogier van der Weyden
c) Other pictures
Crypto portraits, ie. pictures some people believe to be hidden portraits of CtB
The right wise man from the Columba altarpiece by Rogier van der Weyden:
John the apostle from the Last Judgement painting by Memling. The resemblance is striking but the apostle’s eyes are brown and brown was not one of the colours mentioned by sources.
From a history book
Found on the internet:
From the Nanceidos (1518)