Laura,
I agree that the Bayeux Tapestry is an excellent example of ‘bibles for the illiterate’ in this time period; in fact, I used it as an example in my post as well. I think it is safe to say that arts, such as the Tapestry, were created specifically for pilgrims and the illiterate alike so that they could be read, observed, and learn from while on the move. Without them, many of the pilgrims of the time might have gone without the equal understanding of other believers of the time.