Sunlight does indeed do a great deal of damage. When I was newly married we had a framed replica of an old map of Switzerland (I picked it because of my Swiss ancestry and the cantonal coats of arms in the margin) which was bleached nearly white by the sun.
When I had my registration certificate from the Bureau of Heraldry framed, I made sure I hung it in the room that gets the least sunlight (and no direct sunlight on that particular wall at all).
If memory serves, the glass is UV-resistant. It certainly is glare-proof.
Regards,
Mike